The Fellowes Professional Series Executive Keyboard Tray FEL8036101 offers effortless adjustment for most standard keyboards and desks. It features total knee clearance and a curved design that brings you closer to the desk for improved ergonomics. The tray allows for one-handed motion to reposition height, while a lever adjusts the angle of the keyboard tray. Additionally, the plush gel cushion enhances comfort during use. The mouse tray can be mounted to the right or left of the keyboard with custom height and position options, and it includes a 21-5/8" track for smooth movement. Dimensions are 28-1/5"W x 21-1/4"D x 5-3/4"H, with height adjustments ranging from 2-5/8" above the track to 4-1/4" below the track.