Polyolefin Tread Wheel, 500 lb Load Rating, 300 to 999 lb Load Rating Range, 6 in Wheel Dia., 2 in Wheel Width, Polyolefin Wheel/Tread Material, Hard, 75 Shore D, Plain, Standard Tread Shape, 1/2 in, 5/8 in For Axle Size, Yes Includes Spanner Bushing, Plastic Wheel Core Material, Yes Non-Marking, 2 1/4 in Hub Length. This item has been restricted from sale in the following state (s): []