... ,SS440 Rings; Quanlity:ISO9001:2000 Type:Open,ZZ,2RS. 60/28 Hybrid ceramic bearings :Full custom-made as request.Double row, good ... Applied to electrical machines or motorsMaterial: chrome steel, Stainless steel, Ceramic(ZrO2, Si3N4), Plastic, Carbon steel, etc.Surface Special finish: Zinc ... , 61912,61913,61914,61915,61916,61917,61918,61919,61920. 60/28 Hybrid Ceramic Bearings