Size:6203 Style:6203 Note: Ball bearings are lubricated with imported grease in our factory, please wash thoroughly after touching. DAFUNY Live Smart, Live Better. DAFUNY Ball Bearings DAFUNY 4 pack 6203-2RS ball bearings are made of bearing steel and the lifespan is longer than carbon steel. 2RS / Double rubber seal - Good sealing effect, low rotational resistance and medium temperature resistance.