Humanscale 500 Keyboard Tray Big Board Platform w/ 2G Arm mechanism, 22" track, and Gel palm rest
500 Standard Keyboard Platform made of phenolic, an ultra-strong, remarkably thin (1/4?) composite that?s non-toxic, durable and easy to clean. Standard 500 platform designed to support nearly all standard keyboards and to fit most desks. Available with any of our mouse options. Dimensions: 19" w x 10 5/8" d. Each of our platform options is designed to ensure that users type and mouse within their Neutral Reach Zone, thereby encouraging safe, sustainable working postures.