Stem Caster, Swivel Caster with Brake, 40 lb Load Rating, 0 to 299 lb, 1 5/8 in Wheel Dia., Nylon Wheel/Tread Material, 2 in Mounting Height, Plain, 5/16 in x 1-1/2 in Caster Stem Size, Grip Neck, Nylon Caster Frame Material, No Finish Frame Finish, Yes Non-Marking, 2 Number of Wheels