Twin-Wheel Threaded Stem Caster, Swivel Caster with Total Lock, 175 lb Load Rating, 0 to 299 lb, 4 in Wheel Dia., 2 3/4 in Wheel Width, Polyurethane Wheel/Tread Material, 4 7/8 in Mounting Height, Precision Ball, 25/64 in x 9/16 in Caster Stem Size,...