Polyurethane Tread on Iron Core Wheel, 375 lb Load Rating, 300 to 999 lb Load Rating Range, 4 in Wheel Dia., 1 1/2 in Wheel Width, Polyurethane Wheel/Tread Material, Firm, 95 Shore A, Delrin, Standard Tread Shape, 3/8 in For Axle Size, No Includes Spanner Bushing, Iron Wheel Core Material, Yes Non-Marking, 1 3/4 in Hub Length. This item has been restricted from sale in the following state (s): []