Nonmarking Rubber Tread on Plastic Core Wheel 280 lb Load Rating 0 to 299 lb Load Rating Range 5 in Wheel Dia 1 1/4 in Wheel Width Thermoplastic Rubber Wheel/Tread Material Soft 75 Shore A Delrin Standard Tread Shape 5/16 in For Axle Size Not Included Includes Spanner Bushing Polyurethane Wheel Core Material Yes Non-Marking 1 1/2 in Hub Length