Caster Wheel, 700 lb Load Rating, 300 to 999 lb Load Rating Range, 3 1/2 in Wheel Dia., 1 3/8 in Wheel Width, Nylon Wheel/Tread Material, Hard, 75 Shore D, Not Applicable, Standard Tread Shape, 1/2 in For Axle Size, Not Included Includes Spanner Bushing, Nylon Wheel Core Material, No Non-Marking, 1 1/2 in Hub Length