The UCSAMS-GM Adjustable Monitor Shelf lets you place your monitor at the proper viewing height. Easy-to-adjust knobs on the sides tilt the shelf to the correct angle to minimize screen glare. Shelf adjusts from 7" to 11-1/2" H in 3/4" intervals. This shelf is used with UCS500-GM, UCS700-GM, UCS800-GM, UCS925-GM and UCS925SD-GM.