Description: 【Material】This under desk keyboard sliding tray is made of plastic and metal rail, not easy to break, lightweight and sturdy 【Size Information】Desk Keyboard Drawer measures approx 51.5cmx26.9cm/20.28inchx10.59inch, height 3.3cm/1.30inch, for more detailed size information, please refer to the image 【Drawer Design】Keyboard Tray Under Desk with the drawer design, which is convenient and easy to pull it out and push it in 【Easy to Install】under Desk Keyboard Drawer comes with all necessary mounting hardware, and has a simple assembly process 【Save Desktop Space】Keyboard Organizer with smooth gliding is positioned at the exact height under desk, suitable for most keyboards Size Chart: White 35mm W Rail: rail width 3.5cm/1.38inch Black 35mm W Rail: rail width 3.5cm/1.38inch White 27mm W Rail: rail width 2.7cm/1.06inch Black 27mm W Rail: rail width 2.7cm/1.06inch Package Includes: 1 Under Desk Keyboard Sliding Tray with Rails Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.