Cotytech Fully Adjustable Ergonomic Keyboard Mouse Tray -Ball Bearing-Lever (KFB-5M-BB) Composed of keyboard clamp, mouse tray (right or left hand) and wrist rest; extremely smooth movements with ball bearing mechanisms; Keyboard tray for all keyboard style; steel frame coated black; dimensions: 19.3" (W) x 5.3" - 9.4" (D) Arm adjust tilting angles: 10 up/60 down; keyboard tilting angle: 30; mouse tray rotation: 360; Height adjustment: 5.9" (150mm); Loading area depth: 4.9"-7.5" (125-190mm) (distance from bottom surface of desk to this unit after being installed) Friction track and spring assist mechanism; Control and use your keyboard tray unit in easy ways; Meterials: solid steel & foam