Nonmarking Rubber Tread on Plastic Core Wheel, 135 lb Load Rating, 0 to 299 lb Load Rating Range, 4 in Wheel Dia., 1 in Wheel Width, Rubber Wheel/Tread Material, Soft, 85 Shore A, Plain, Standard Tread Shape, 5/16 in For Axle Size, Not Included Includes Spanner Bushing, Plastic Wheel Core Material, Yes Non-Marking, 1 1/8 in Hub Length