Polyurethane Tread on Steel Core Wheel, 330 lb Load Rating, 300 to 999 lb Load Rating Range, 2 in Wheel Dia., 1 1/4 in Wheel Width, Polyurethane Wheel/Tread Material, Firm, 92 Shore A, Precision Ball, Standard Tread Shape, 5/16 in For Axle Size, Not Included Includes Spanner Bushing, Plastic Wheel Core Material, Yes Non-Marking, 1 3/8 in Hub Length