"The Titan Heavy-Duty Solid Poly Caster offers an easy way to move objects and heavy loads. Capacity lbs. 500, Casters qty. 1, Wheel Diameter in. 5, Material Type Polyurethane, Foot Brake No, Wheel Type Polyurethane, Caster Type Rigid. 5 in. dia. 500-lb. capacity Ideal for use on concrete Chemical-resistant construction"