【Size】: This computer keyboard tray measures a total length of 550mm, with the tray including the slide rail measuring 420mm. The designed to fit most standard desks and provides ample space for your keyboard. 【Durable Material】: Keyboard Drawer Under Desk is made from high quality material that ensures durability and longevity. It is sturdy enough to support your keyboard securely. 【Functionality】: Desk Drawer Keyboard Tray is designed to provide an ergonomic typing position when using your computer. 【Easy Installation】: The included guide rail allows for easy installation under your desk, turning any workspace into an efficient workstation. 【Sliding Keyboard Drawer Under Desk】: Pull out Keyboard Tray, easily slides out for use and back under the desk when not in use. Size Chart: Total Length: 550mm/21.65inch Pallet Including Slide Rail: 420mm/16.54inch Package Includes: 1 Set Keyboard Tray Under Desk Note: Please allow slightly errors due to manual measurement and different monitors.