This is a A-SBK1C Bearing Kit, CS1-CS4 PN: SBK1CMain Description As Following : A-SBK1C Bearing Kit; CS1-CS4 P.N: SBK1C A-SBK1C Bearing Kit; CS1-CS4 P.N: SBK1C Found in Section & Models : Driveline > Shielding, Bondioli & Pavesi 100 Series: Size 1, Bondioli & Pavesi 100 Series: Size 2, Bondioli & Pavesi 100 Series: Size 3, Bondioli & Pavesi 100 Series: Size 4 Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada