Nonmarking Rubber Tread on Plastic Core Wheel 350 lb Load Rating 300 to 999 lb Load Rating Range 4 in Wheel Dia 2 in Wheel Width Thermoplastic Rubber Wheel/Tread Material Soft 85 Shore A Roller Standard Tread Shape 1/2 in For Axle Size Not Included Includes Spanner Bushing Plastic Wheel Core Material Yes Non-Marking 2 7/16 in Hub Length