Check the listing for details. Laboratory 29 Preassembled Keyboard Tray A41. Condition: New – Open box. Listed at 50.00 USD. BrandLaboratory 29Compatible DevicesMouse, KeyboardKeyboard DescriptionErgonomicSpecial FeatureErgonomicColorBlackNumber of Keys275-10 Minute Install: Slide-out under desk keyboard tray boasts preassembled stainless steel side rails and metal C-clamps for easy assembly. Initial install requires 6 screws total. After screws are in, simply affix the C-clamps to the desk Durable Ergonomic 32” Wide Keyboard Tray: Adjustable keyboard tray is made of sturdy wood for extended use. Ergonomic keyboard drawer helps to maintain proper wrist and hand alignment to reduce fatigue and aid in carpal tunnel prevention Increase Your Work Area: Tray fits most desks 33” and wider. Tray surface measures 27” x 11” (32” with clamps) and can easily fit a keyboard, mouse, and phone. Tray hangs 2.75” below desk surface and slides out a total of 9.5” from desk edge Wrist Wrest Also Included for Added Value: High-quality rubber wrist rest also included for increased comfort. Ergonomic construction plus the wrist rest assist in keeping proper sitting posture All Parts Included: Screws, screwdriver, and set-up instructions included. Please watch the video in the images for a detailed visual