... 3.Quality authentication ISO 9001:2000 4.Hardness:62 Specifications1.Ball bearing.Roller bearing. hub bearing 2.material,steel GCR - 15 ... on SeriesSeries 30200, 30300, 32200, 32300, 33000,6000,6200,6300,6400,51100,51200,51300,51400,DAC,BC, etc. Ring MaterialChrome Steel ... .Product packaging FAG, HRB, KOYO, LYC, NSK, NTN, SKF 62012RS BALL BEARING ROLER BEARING AUTO-HUB BEARING