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