StarTech.com Under Desk Keyboard Tray, Clamp on Keyboard Holder, Up to 12kg/26.5lb, Height Adjustable, Ergonomic Sliding Keyboard Drawer - Sliding keyboard tray offers 3 heights (3.9/4.7/5.5in) - This black keyboard drawer extends up to 8.5' and the front is curved for comfort - The Clamp-on keyboard tray supports up to 26.5lb - The under desk keyboard tray area is 27.5x12.2in