3 X 1 Non-Marking Monotech Swivel Caster, No Brake, Loads Up To 110 lb
, 1 in Wheel Width, Polyolefin Wheel/Tread Material, 4 in Mounting Height, Precision Ball, 1-1/2 in13 x 1-1/2 in Caster Stem Size, Threaded, Nylon Caster Frame Material, No Finish Frame Finish, Yes Non-Marking, 1 Number of Wheels.General Purpose Threaded Stem Caster, Swivel Caster, 110 lb Load Rating, 0 to 299 lb, 3 in Wheel Dia.