Caster Wheel, 250 lb Load Rating, 0 to 299 lb Load Rating Range, 6 in Wheel Dia., 2 in Wheel Width, Semi-Pneumatic Wheel/Tread Material, Firm, 65-75 Shore A, Precision Ball, Standard Tread Shape, 1/2 in For Axle Size, Not Included Includes Spanner Bushing, Zinc Plated Wheel Core Material, Yes Non-Marking, 2 7/16 in Hub Length