Stem Caster, Swivel Caster with Brake, 180 lb Load Rating, 0 to 299 lb, 4 7/8 in Wheel Dia., 1/2 in Wheel Width, Nylon Wheel/Tread Material, 5 7/16 in Mounting Height, Plain, 1/2 In.-13 x 1 1/2 in Caster Stem Size, Threaded, Nylon Caster Frame Material, Nylon Frame Finish, Yes Non-Marking, 2 Number of Wheels