Caster Wheel, 250 lb Load Rating, 0 to 299 lb Load Rating Range, 3 1/2 in Wheel Dia., 1 1/4 in Wheel Width, Polyurethane Wheel/Tread Material, Firm, 95 Shore A, Precision Ball, Standard Tread Shape, 1/2 in For Axle Size, Not Included Includes Spanner Bushing, Iron Wheel Core Material, Yes Non-Marking, 1 3/8 in Hub Length.