Fellowes Professional Series Sit/Stand Keyboard Tray, Black (8029801) Increased height adjustment range for taller users (up to 6-1/4 Inches above desktop) Range of motion below desk is 5 inches for custom knee clearance Simple one-handed motion instantly repositions keyboard height without locks or levers 10 Inch round mousing platform mounts over keypad or flush with keyboard for easier mousing Leatherette keyboard palm support with Microban antimicrobial protection keeps product cleaner