Caster Wheel, 3, 500 lb Load Rating, 3, 000 to 5, 999 lb Load Rating Range, 6 in Wheel Dia., 2 1/2 in Wheel Width, Iron Wheel/Tread Material, Extra Hard, 179 BHN, Roller, Standard Tread Shape, 1 in For Axle Size, Included Includes Spanner Bushing, Ductile Iron Wheel Core Material, Yes Non-Marking, 3 1/4 in Hub Length. This item has been restricted from sale in the following state (s): []