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