The Blickman 1520SS Stainles Steel Mayo Stands are a superior choice for value-conscious customers. The 1520SS mayo stands utilize a Tru-Loc© friction knob for manual locking at desired height. The 1520SS uses a lighter tray support and stainless steel base (one size only). The 1520SS travels easily on 2″, single-wheel casters. The height adjustment is 37 1/4″ to 64″ and the tray size 12-5/8″ x 19-1/8″.