Cardinal Health Double Post Mayo California Style Base Instrument Stand, 34" - 53".Height adjustment, 34-53IN; California-style base for easy positioning; Removable stainless steel tray, 19.25 x 12.62 x 0.75IN, base 20IN, wheel diameter 29IN; 1IN chrome-plated steel tubing and 2 rubber wheel, ball bearing casters; Base, 20IN wheels, 29IN diameter.