Specification: Package: 8 pcs Bore Diameter: 3/4inch Outer Diameter: 1-3/8inch Inside Ring Height: 1/2inch Outer Ring Height: 7/16inch Flange Thickness: 5/64inch Flange Diameter: 1-1/2inch Limit Dynamic Load 1500 Pounds Limit Dynamic Speed 4600 rpm Application: Mounting type 3/4inch inch bore, for use with flat free wheels up to 1-3/8inch inch hub, suitable for lawn mower, wheelbarrows, garden carts, hand trucks, pressure washers, generators, air compressors and more. Known replacement codes / Following codes are for reference only, please refer to the product size as the standard. 5320x11x28722, 7028722YP, 1305379. 110513, 251-210.