Stem Caster, Swivel Caster with Brake, 225 lb Load Rating, 0 to 299 lb, 4 7/8 in Wheel Dia., 1/2 in Wheel Width, Rubber Wheel/Tread Material, 5 5/16 in Mounting Height, Plain, 7/16 in x 1-7/16 in Caster Stem Size, Friction Ring, Nylon Caster Frame Material, Nylon Frame Finish, Yes Non-Marking, 2 Number of Wheels