Polyolefin Tread Wheel 450 lb Load Rating 300 to 999 lb Load Rating Range 6 in Wheel Dia 1 1/4 in Wheel Width Polyolefin Wheel/Tread Material Hard 65 Shore D Precision Ball Standard Tread Shape 3/8 in For Axle Size Not Included Includes Spanner Bushing Polyurethane Wheel Core Material Yes Non-Marking 1 9/16 in Hub Length