... Rings; Quanlity:ISO9001:2000 Type:Open,ZZ,2RS. 63/22 Hybrid ceramic bearings :Full custom-made as request.Double ... sealed design. 6) The seals way of the bearing: RS: contact seal on one side of the bearing 2RS: ... on both sides of the bearing. 7) Bearing with -RS seals has better sealing but lower limited speed compared with ... ,61914,61915,61916,61917,61918,61919,61920. 63/22 Hybrid Ceramic Bearings