2. Ball bearing.Roller bearing. Hub bearing 3.material,steel GCR - 15 4Quality authentication ISO 9001:2000 5.Hardness:62 Auto bearing2. Ball bearing.Roller bearing. Hub bearing 3.material,steel GCR - 15 4Quality authentication ISO 9001:2000 5.Hardness:62Greese/OilAs you requirement, such as SRL ,PS2, Alvania R12 and so on SeriesSeries 30200, 30300, 32200, 32300, 33000,6000,6200,6300,6400,51100, ...