Keyboard shelf adjusts 25-29"H for user comfortKeep all components at your fingertips with these heavy-duty steel workstations. Keyboard and printer rest on 22" W x 17" D roll-out, adjustable height locking shelves, and the printer shelf is slotted for continuous forms. Comes with 4" casters (2 locking) and a putty powder-coat finish. No.EC4X-P4 adds the convenience of a mouse shelf. Ships ready to assemble.