Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s)

Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s) is a best product that alot of people looking for adjustable desktop.A lot of people looking for this Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s) when they need some adjustable desktop,If you have any problem to adjust your monitor or tv,I think This Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s) is can be your best chooice if you are looking for best adjustable desktop.If you having trouble with adjust stand up desk and you want use adjustable desktop you must try to read some review for this Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s).

Read about Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s) in description below to know if this Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s) are supposed with you Or not.Or you can find another best product for adjustable desktop if you doesn't like this.We have alot product review for adjustable desktop that you can read in this blog.

This adjustable height reading stand is amazing! The premium anodized aluminum 18x10in panel is sturdy enough to hold books of all sizes (yep, even those 8-ton medical and law school books). The rotating platform can be locked in 15-degree increments from flat to vertical to ensure your materials are held at the most comfortable viewing angle. Articulating legs operate with a simple push-button and extend the height of the stand from flat to almost 2ft tall - ensuring that materials are held at YOUR eye-level to prevent hunching and slouching. Overall, this is the perfect ergonomic reading stand - great for college students and anyone who reads a lot. SPECS 1. HEIGHT RANGE = Adjustable from a collapsed height of only 2 in to a max height of 21 in (measured to the base of the panel) 2. PANEL ANGLE = rotates 360 degrees | locks in 15-degree increments 3. PANEL WIDTH ~ 18" left-to-right | 10" front-to-back 4. PRODUCT WEIGHT ~ 4lbs 5. PREMIUM CONSTRUCTION: Custom-designed with the highest quality components. The anodized aluminum panel (not a cheap, painted product) is elegant and durable. Re-engineered push-button joints are sturdy, secure and easy to manipulate. It’s the ultimate ergonomic reading stand! This textbook holder book stand is designed to make reading and studying more comfortable just about anywhere - sitting at a desk, laying in bed, and lounging on the couch.

• ADJUSTABLE HEIGHT: Raise reading materials to eye-level and stop slouching | Height Range: 0-21"
• ADJUSTABLE ANGLE: decrease page & screen glare. Eliminate eye strain. Panel locks in 15-degree increments
• OPEN SPACE BOTTOM: Helps de-clutter & organize desk space. Perfect place for taking notes!
• LIGHTWEIGHT: Premium anodized aluminum panel | sturdy, durable, and portable | Collapses Flat | <4.5lbs
• PERFECT for studying, reading textbooks & cookbooks | Slips over your lap in bed and on the couch to make reading more comfortable

And there is some review about Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s) one of best product for adjustable desktop.Thank you for reading this review about Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s).if you think this Uncaged Ergonomics Adjustable Height/Angle Holder Desktop Book Stand, Silver (RS-s) suitable for you,you can give some share to growup this site,Other wish,you can try looking for another product for adjustable desktop in this blog.I hope this review can helping you to get best product for adjustable desktop

NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black

NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black is a best product that alot of people looking for raising desk.A lot of people looking for this NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black when they need some raising desk,If you have any problem to adjust your monitor or tv,I think This NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black is can be your best chooice if you are looking for best raising desk.If you having trouble with adjust stand up desk and you want use raising desk you must try to read some review for this NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black.

Read about NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black in description below to know if this NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black are supposed with you Or not.Or you can find another best product for raising desk if you doesn't like this.We have alot product review for raising desk that you can read in this blog.

Product Description :

It's a Transformers like multifunctional laptop foldng desk with unique design and fine processing, well heat absorbing and cooling functions.

Each side has 2 folding legs with 3 pcs 360º rotation Aluminum Alloy branches,just acting like the human leg as the feet,legs,thighs .

In the aspects of bionics in order to get the same flexibility,sitting,standing,kneeling,squatting and etc.,any posture serving as you like.

Just press the button gently for freely adjustment,then release the button,the joint is fixed immediately,not artificial laboriously rotating like the traditional bolt fixed table did, solid and durable.

It is ideal for raising up your tablet, laptop on a desk or your lap. It can also be used as a Breakfast Tray, Book Tray, Writing Desk, Tablet Holder, Stand Up Desk, Gaming Table, Cooling Pad and etc.

Wherever it is used - be it a desk, sofa or your lap - This table provides a most comfortable typing angle and reduces neck and shoulder stress thanks to its unique design and shape.

Specification

Material: Aluminum Alloy

Surface process:sand-blasting oxidation

Table net size: 52*26cm/ 20.5*10.5in

Maximum height: 48cm/18.9in

Size after folding:64*26*4.5cm/25.2*10.5*1.8in

Branch length: 25cm

Branch number: 6 (3*2)

Desktop adjustable angle:360 degrees

Weight: about 2kg

Bearing capacity: 15kg(maximum )

Suit for 7-17'' computer

Include:notebook desk*1

• High Strength Aluminium,Light Weight,Compact, Foldable and Easy to Carry
• Adjustable Auto-locking Joints with 360 Degree Rotation to Fit Any Boby Position
• Table Size :52*26cm,Designed for 7-17 inch Laptops, Ideal for Raising Up Your Tablet, Screen or Laptop On a Desk or Your Lap
• With Two Quiet USB Powered CPU Cooling Fans,Connect USB Cord (Included) to Your Computer to Power The Quiet Cooling Fans.
• Can be Used as a Breakfast Tray, Standing Desk, Book Tray, Writing Desk, Tablet Holder, Stand Up Desk, Gaming Table, Notebook Stand, Laptop Tray, Foldable Laptop Desk, Cooling Pad, Computer Stands for Laptop, Folding Tray Table, Standing Desk Converter, Laptop Base, Ergonomic Laptop Riser, Desk Raiser, Laptop Cart, Laptop Holder, Folding Lap-top Mount and etc.

And there is some review about NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black one of best product for raising desk.Thank you for reading this review about NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black.if you think this NATAMO Adjustable Aluminium Alloy Laptop Riser / Stand / Table with Mouse Pad and Dual Cooling Fan Foldable Notebook Desk Bed Tray Book Stand for Home / Office,20.5''*10.5'', Black suitable for you,you can give some share to growup this site,Other wish,you can try looking for another product for raising desk in this blog.I hope this review can helping you to get best product for raising desk

Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top

Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top is a best product that alot of people looking for sit to stand desk.A lot of people looking for this Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top when they need some sit to stand desk,If you have any problem to adjust your monitor or tv,I think This Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top is can be your best chooice if you are looking for best sit to stand desk.If you having trouble with adjust stand up desk and you want use sit to stand desk you must try to read some review for this Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top.

Read about Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top in description below to know if this Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top are supposed with you Or not.Or you can find another best product for sit to stand desk if you doesn't like this.We have alot product review for sit to stand desk that you can read in this blog.

With the AlphaBetter Desk students have a new desire to learn. Designed for students in grades 3-12, the AlphaBetter Desk easily adjusts from 26" to 42" high to allow students the choice to stand or sit while in the classroom. With our exclusive patented Swinging Pendulum Footrest Bar students have a new way to sway (Patent Nos. 8061278 & 8291833). The footrest allows students to swing their feet providing extra movement to burn off excess energy. In addition it helps to correct posture. The steel frame with black powder coat finish is built for long lasting durability. The MDF top is covered with extremely durable 3D thermoplastic laminate which is fire, chemical and impact resistant. Lower shelf provides additional storage of books and supplies. Global Educator Institute Seal of Endorsement. Alpha better Stool Models 1205BE and 1205BL (sold separately).

• AlphaBetter stand-up student desk for grades 3-12
• Desk adjusts from 26" to 42"H in 1 1/4" increments, includes book box 22"W x 15"D x 4 3/4"H and lower shelf for additional storage
• Patented swinging pendulum footrest fidget bar, Patent nos. 8061278 and 8291833
• MDF top with durable fire, chemical and impact resistant 3D thermoplastic laminate finish, steel frame with durable black powder coat finish
• Optional AlphaBetter Stool Models 1205BE and 1205BL, sold separately

And there is some review about Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top one of best product for sit to stand desk.Thank you for reading this review about Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top.if you think this Safco Products 1202BE Alphabetter Stand-Up Desk with Swinging Footrest Bar, 28" x 20" Standard Top with Book Box, Black Frame/Beige Top suitable for you,you can give some share to growup this site,Other wish,you can try looking for another product for sit to stand desk in this blog.I hope this review can helping you to get best product for sit to stand desk

Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black)

Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black) is a best product that alot of people looking for raising desk.A lot of people looking for this Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black) when they need some raising desk,If you have any problem to adjust your monitor or tv,I think This Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black) is can be your best chooice if you are looking for best raising desk.If you having trouble with adjust stand up desk and you want use raising desk you must try to read some review for this Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black).

Read about Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black) in description below to know if this Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black) are supposed with you Or not.Or you can find another best product for raising desk if you doesn't like this.We have alot product review for raising desk that you can read in this blog.

The Fasmov adjustable Laptop Table is great for raising up your tablet, screen or laptop on a desk or your lap,that feature is air vented cavities design which reduce overheating on your laptop / notebook.The extraordinary locking button that can be set in full 360 degree angles to fit any body position, even laidback on your bed. Just hold the button on the joints, change the position, and release the button to lock it in place.

• Made by aluminum alloy and plastic,light weight and strong
• Rotate 360 Degrees and Lock in Place at Various Angles. Quickly Collapse The Stand to Make it Portable
• Silent built-in fans - cool your laptop on USB power
• Table Can Also Be Used as a TV Dinner Tray, Sound Equipment, Projector, Standing Desk, Book Tray, Writing Desk, and Tablet Holder
• Collapsible frame for easy storage and portability. Can be set in multiple angles to fit any body position, even laid back on your bed; just hold the button on the joints, change the position, and release the button to lock it in place

And there is some review about Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black) one of best product for raising desk.Thank you for reading this review about Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black).if you think this Fasmov Adjustable Vented Laptop Table Laptop Computer Desk Book Stand Aluminum Laptop Desk Bed Tray with Mouse Pad (Black) suitable for you,you can give some share to growup this site,Other wish,you can try looking for another product for raising desk in this blog.I hope this review can helping you to get best product for raising desk

Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17"

Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17" is a best product that alot of people looking for ergonomic desk.A lot of people looking for this Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17" when they need some ergonomic desk,If you have any problem to adjust your monitor or tv,I think This Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17" is can be your best chooice if you are looking for best ergonomic desk.If you having trouble with adjust stand up desk and you want use ergonomic desk you must try to read some review for this Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17".

Read about Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17" in description below to know if this Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17" are supposed with you Or not.Or you can find another best product for ergonomic desk if you doesn't like this.We have alot product review for ergonomic desk that you can read in this blog.

Pwr+ laptop table helps reduce the operating temperature of your laptop and allows for steady airflow around it. It uses active cooling methods to distribute air quietly and evenly under the base of your laptop or netbook. Powered by your laptop's USB port (usb cord is included), two silent fans use so little energy that it won't even have any impact on the battery life. It is the legs that make the table so unique: with its adjustable auto-locking joints that rotate around 360 degrees it can hold things in a variety of configurations. Wherever it is used - be it a desk, sofa or your lap - Pwr+ table provides a most comfortable typing angle and reduces neck and shoulder stress thanks to its unique design and shape. And it is a perfect breakfast tray also! compatibility: acer aspire one, m5 r7 s3 s7 v5; Travel Mate/ apple MacBook 13" 15" 17" (pro, air, Unibody) PowerBook g4 / ASUS VivoBook, Zenbook prime, Eee pad transformer book trio, infinity, Taichi, ROG / dell Inspiron, latitude, XPS 12 14, precision, Alienware, Vostro/ FUJITSU Lifebook / HP pavilion, envy, Spectre, split x2; EliteBook folio, ProBook, ZBook; Compaq Presario / LENOVO IdeaPad, yoga; ThinkPad, x1 carbon, twist / PANASONIC Toughbook / SAMSUNG ATIV book 2, 4, 5, 6, 7, 8, 9, lite, plus, Chronos, smart pc, Chromebook 2 / SONY VAIO, tap 11, duo, flip / TOSHIBA satellite, Qosmio, KIRAbook, Portege / MSI, gateway series.

• LIGHT WEIGHT, HIGH STRENGTH ALUMINUM TRAY, STURDY FULLY ADJUSTABLE LEGS - Makes Carrying Easy and Holds Your Computer Firm and Steady. Rotate 360 Degrees and Lock in Place at Various Angles. Quickly Collapse The Stand to Make it Portable.
• QUIET USB POWERED CPU COOLING FANS - Connect USB Cord (Included) to Your Computer to Power The Quiet Cooling Fans.
• USE IT ANY WAY YOU WANT IT - Table Can Also Be Used as a Breakfast Tray, Standing Desk, Book Tray, Writing Desk, Tablet Holder, Stand Up Desk, Gaming Table, Notebook Stand, keyboard Lift, Laptop Tray, Keyboard Riser, Foldable Laptop Desk, Cooling Pad, Computer Stands for Laptop, Adjustable Pedestal Fan, Folding Tray Table, Standing Desk Converter, Laptop Base, Ergonomic Laptop Riser, Desk Raiser, Laptop Cart, Laptop Holder and etc
• NO ASSEMBLY REQUIRED - Collapsible frame for easy storage and portability. Can be set in multiple angles to fit any body position, even laid back on your bed; just hold the button on the joints, change the position, and release the button to lock it in place
• MONEY BACK GUARANTEE - Headquartered in Woodinville WA and Operating since 2007, We are USA based Company that Wants your Repeat Business so, if You Do Not Like our Product or Don't Want It For Any Reason, We Will Happily Accept The Return and Give You Your Money Back. No Questions Asked. 30 Days Money Back Guarantee - 24 Months - Exchange - Phone Service is Available (Hint: Always Check Sellers Location Info to Guarantee Warranty Claims after 30 Days)

And there is some review about Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17" one of best product for ergonomic desk.Thank you for reading this review about Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17".if you think this Pwr+ Portable Laptop-Table-Stand with Mouse Pad Fully Adjustable-Ergonomic Mount-Ultrabook-Macbook Light Weight Aluminum-Black Bed Tray Desk Book Fans Up to 17" suitable for you,you can give some share to growup this site,Other wish,you can try looking for another product for ergonomic desk in this blog.I hope this review can helping you to get best product for ergonomic desk

iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black)

iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black) is a best product that alot of people looking for standing work desk.A lot of people looking for this iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black) when they need some standing work desk,If you have any problem to adjust your monitor or tv,I think This iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black) is can be your best chooice if you are looking for best standing work desk.If you having trouble with adjust stand up desk and you want use standing work desk you must try to read some review for this iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black).

Read about iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black) in description below to know if this iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black) are supposed with you Or not.Or you can find another best product for standing work desk if you doesn't like this.We have alot product review for standing work desk that you can read in this blog.

Need a multifunctional laptop workstation? Or a TV tray for food / snack? Even a bed tray desk to enjoy your breakfast? We have them all cover. This adjustable VENTED aluminum laptop notebook table features air vented cavities design which reduce overheating on your laptop / notebook. The extraordinary locking button that can be set in full 360 degree angles to fit any body position, even laidback on your bed. Just hold the button on the joints, change the position, and release the button to lock it in place. Grooved table surface to prevent slippage, and collapsible frame for easy storage and carrying. Wrist guard added extra comfort. It weights 5 pounds and can support up to 30 pounds capacity.

• Made by aluminum alloy - ultra light and strong
• Silent built-in fans - cool your laptop on USB power
• Patented joint locking design to fit virtually any angles and positions
• Highly functional with multiple uses. Easy storage and portability. It weights 5 pounds and can support up to 30 pounds capacity.
• The extraordinary locking button that can be set in full 360 degree angles to fit any body position, even laidback on your bed

And there is some review about iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black) one of best product for standing work desk.Thank you for reading this review about iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black).if you think this iCraze Adjustable Vented Laptop Table Laptop Computer Desk Portable Bed Tray Book Stand Multifuctional & Ergonomics Design Dual Layer Tabletop (Black) suitable for you,you can give some share to growup this site,Other wish,you can try looking for another product for standing work desk in this blog.I hope this review can helping you to get best product for standing work desk