15x48x15mm PU Covered Bearing - Roller Wheel - Sealed - TirePolyurethane Sealed Ball Bearing with Tire 15mm x 48mm x 15mm PU Covered Wheel Bearing This polyurethane coated ball bearing is built for heavy duty use where impact resistance and abrasion durability matter. With a rubber sealed deep groove design and a PU tire bonded to its outer ring, it's a great fit for carts, rollers, and guide wheels that take a beating. Pack of 1 bearing Deep groove ball bearing with PU tire Bearing steel core (GCr15 grade)