Add this optional sliding printer shelf attachment to your mobile workstation and make mobile printing easy and convenient. Shelf slides in when printer is not in use or when moving work station to new location. Keeps printer safely tucked away to prevent printer from falling during transport. Dimensions: 21"Wx19"Dx2"H. Requires shelf B124 (24"x22" for NB Series), B127 (26"x30" for PC Series) or B143 (26"x48" for PC Series) for appropriate mounting and operation.