Nonmarking Rubber Tread on Plastic Core Wheel 600 lb Load Rating 300 to 999 lb Load Rating Range 6 in Wheel Dia 2 in Wheel Width Rubber Wheel/Tread Material Soft 65 Shore A Precision Ball Standard Tread Shape 1/2 in For Axle Size Not Included Includes Spanner Bushing Nylon Wheel Core Material Yes Non-Marking 2 7/16 in Hub Length