Heat-Resistant Steel Tread Wheel 1 100 lb Load Rating 1 000 to 2 999 lb Load Rating Range 4 in Wheel Dia 1 1/2 in Wheel Width Steel Wheel/Tread Material Extra Hard 179 BHN Precision Ball Standard Tread Shape 1/2 in For Axle Size Included Includes Spanner Bushing Forged Steel Wheel Core Material No Non-Marking 2 1/2 in Hub Length