The Blickman 8848SS (Stanford) Mayo Stand maneuvers easily with a four caster, heavy-duty stainless steel base for ease of mobility. Great for the ER or exam rooms. Height adjusts with a Tru-Loc™ friction knob. The 8848SS height adjustment is 39-1/2" to 62" with a tray size of 12-5/8 x 19-1/8".