10/20PC R8-2RS Double Rubber Sealed Roller Ball Bearing 1/2 Inch Bore 1/2 x 1-1/8 x 5/16 Inch 12.7*28.57*7.938 Precision BearingHome Improvement > Hardware10,76 USD (≈ 9,63 €)11,83 USDDisponibileSold by AliExpress WWVai al negozio