209KRRB2 Two Single Lip Shroud Seals Hex Bore Agricultural Bearing 1 1/2" Inch Inner Diameter 209KRRB2 Single Lip Shroud Seals, 209KRRB2 Bearing is a hex bore, it Used in applications where collars, set scews, or any other locking devices are not required. 209KRRB2 incorporates trash seal, bearing is a close fitting metal shield backed by a molded rubber seal.