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Humanscale 900 Keyboard Tray Build Your Own Single or Dual Mouse

SKU hus051


Original price $263.00 - Original price $339.00
Original price
$263.00 - $339.00
Current price $263.00

Humanscale 900 Tray

An ergonomically designed keyboard is essential for every workstation. Ergonomists agree that the healthiest typing posture is one that allows the wrists to maintain a neutral or slightly pronated posture – straight or bent at a slightly downward angle. For that reason, Humanscale designers created our under desk keyboard trays, which allow the keyboard to be ergonomically positioned anywhere from 0 degrees to a -15 degree angle.

Keyboard Support

In many ways, a keyboard support is the heart of an ergonomic workstation. As reach and vision drive posture, our keyboard tray allows the user to sit in a healthy, neutral posture through bringing the keyboard and mouse to the user in an ergonomic position.

Well Designed

A well-designed keyboard tray offers protection from carpal tunnel syndrome, neck and back pain and other musculoskeletal issues.

Postural Benefits

These postural benefits can’t be achieved by just using a keyboard on a height-adjustable work surface.

Arm Selection






Humanscale keyboard 900's have been the heart of any workstation. The keyboard tray allows anyone to sit in a neutral postures and bringing the keyboard and mouse to the person rather then the you to the keyboard and mouse. After many years of designing the perfect ergonomic keyboard was made. The design offers protection from carpel tunnel syndrome, back pain, neck strain, and other musculature issues.

Mouse Platform

The Clip mouse allows the user to change positions of the mousing platform to support their most ergonomic position. With lateral, depth, and tilting adjustments the 900 keyboard tray can be positioned correctly where the user truly needs it. It also supports left handed and right handed users.

High clip mouse platforms are models 90 and 91 and support two positions. The first is parallel and to the left or right of the keyboard. The next position is 1.5" above the keyboard tray.

The clip mouse features add's at least 4" to a max of 10" to left or right hand side of the keyboard tray.

8.5" Clip Mouse Left or Right 90
8.5" Clip Mouse D is for Dual Both sides 90D
8.5" High Clip left or right 90H
8.5" High Clip D is for Dual Both sides 90HD
10" Clip Mouse Left or Right 91
10" Clip Mouse D is for Dual Both sides 91D
10" High Clip Left or Right 91H
10" High Clip D is for Dual Both sides 91HD

Clip Mouse

Side View

8" Swivel Right 11R
8" Swivel Left 11L
8" Swivel Dual 11D
10" Swivel Right 12R
10" Swivel Left 12L
10" Swivel Dual 12D

Swivel Left or Right

Swivel Dual

The swivel mouse attaches to Humanscale's standard platform that supports all standard keyboards. The swivel allows for a huge range of adjust-ability within your sitting zone.

Corner Solution Accessories


• Fits desks 1" to 1.5" thick
• Dimensions: 29.5" x 12.188"
• Color: Black (standard)


• Fits desks 1.5" to 2.5" thick
• Dimensions: 38" x 13.75"
• Color: Black (standard)


• Fits desks 1" to 1.5" thick
• Dimensions: 38" x 13.75"
• Color: Black (standard)


• Fits desks 1.5" to 2.5" thick
• Dimensions: 16" diameter
• Color: Black (standard)


• Fits desks 1" to 1.5" thick
• Dimensions: 16" diameter
• Color: Black (standard)

Customer Reviews

Based on 21 reviews

I've tried a few other keyboard trays and they were all lightweight and flimsy and I was always afraid to put much weight on them for fear of them falling apart. This tray is sturdy and the mouse pad is great because you don't have to squeeze everything onto one tray.

K Ennis
Great product, well made but expensive new. Suggest a used unit as there is not much to the unit...

Nice tray, and used was the best way to go. I think Humanscale products are well made but expensive for what the product actually does. I made a slight mod to the mouse tray by drilling a small hole through the keyboard main tray and the mouse pad and inserted a locking pin to keep the mouse pad more stable during use. Other than that I am completely pleased with the unit and enjoy being able to sit stand with the articulated keyboard.

THE BEST in my 20+ year use experience

I've had mine for over a decade. I've purchased many others for my wife and in other situations -- none come close. Mine has held up incredibly well. It has a solid feel. I only found this on here today because it's starting to fade and I wanted to see if they were still being made.


I ordered this for a client. My feeling was there are alternatives for $100 less that would have suited, but this is what they wanted. I deducted a star for missing hardware...this thing only came with 10 round head flat head rubber bumper for the back. I deducted another star just for the humanscale hype...ugh. It is really just okay. I am generally a pretty positive reviewer and give tons of five star reviews...this one just got on my bad side with the missing hardware and it was downhill from there.

Five Stars

Works perfectly, smooth action!