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