... ,long life 3. OEM sevice 4.GCR15 Chrome steel material 2012 HOT SALE SUPPLY!!! 6218 bearing Model ... 2Z 2RS Z RSMaterialRing Material Chrome Steel ,Carbon steel,Stainless steelCage material Nylon ,steel , brass ClearanceC0,C2,C3,C4, ... C5VibrationZv1,Zv2 and Zv3Precision RatingP0,P6,P5GreeseAs you requirement, such as SRL ...