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