Polyolefin Tread Wheel 145 lb Load Rating 0 to 299 lb Load Rating Range 5 in Wheel Dia 1 in Wheel Width Polyolefin Wheel/Tread Material Hard 75 Shore D Plain Standard Tread Shape 5/16 in For Axle Size Not Included Includes Spanner Bushing Plastic Wheel Core Material Yes Non-Marking 1 1/8 in Hub Length