... ,steel , brass ClearanceC0,C2,C3,C4,C5VibrationZv1,Zv2 and Zv3Precision RatingP0,P6,P5GreeseAs you requirement, such as SRL ,PS2, Alvania R12 ... and so on .Number of RowSingle Row GuaranteeOne year. ... 2.Low vibration3.high rolling accuracy2:Product photos Supply you high quality and high precision Deep groove ball bearings nsk 6000