Polyurethane Tread on Iron Core Wheel 700 lb Load Rating 300 to 999 lb Load Rating Range 4 in Wheel Dia 2 in Wheel Width Polyurethane Wheel/Tread Material Firm 92 Shore A Roller Standard Tread Shape 1/2 in For Axle Size Not Included Includes Spanner Bushing Iron Wheel Core Material Yes Non-Marking 2 7/16 in Hub Length