... 3)High quality ceramic ball CIXI DUOJING BEARING Co., Ltd - hybrid stainless ceramic skate ball bearings 608 2rsLD608 Ceramic ball bearingsMaterial: Si3N4 ball / Zr02, nylon ... /ShanghaiOEM Service Offered, Design Service Offered, Buyer Label OfferedDeep groove ball bearingWe have Open, Z, ZZ, RS, 2RS, RZ, ... all kinds of different country buyers hybrid stainless ceramic skate ball bearings 608 2rs