SKF ball bearing 6009
1. Material:Chrome steel/GCr15
2.Main brand:German:FAG,INA Sweden:SKF.American:TIMKEN

SKF BEARING/Deep Groove Ball Bearing

Further: 

1) RS: contact seal on one side of the bearing

2) 2RS: coontact seals on both sides of the bearing

3) Z: shield on one side of the bearing

4) ZZ(2Z): shields on both sides of the bearing.

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