Aar Standard Cartridge Roller Bearing (6 1/2"X9") Class-K Complete With Backing Ring And A Xle End Cap To Nei Drg. No. Rbsd-7077 Rev'B' Or Latest. Or Aar Standard Cartridge Roller Bearing (6 1/2"X 9") Class-K With Backing Ring And Axle End Cap To Timken Drg. No.-E-56020 Or Latest. Or Class K Compact Tbu (6 1/2"X9") With Backing Ring And Axle End Cap To Skf Product Designation Bt2-8606 Or Latest Or Simi Lar. Specn. No. :- Ab/Rb-41-2016 (Rev. 1). Guarantee/Warranty :- The Bearings Complete And Their Compone Nts (In Case Supplied Individually) Shall Be Guaranteed For Satisfactory Performance For A Period Of 48 Month S After Supply Or 36 Months After Putting Into Service, Whichever Is Earlier [ Warranty Period: 48 Months After The Date Of Delivery ] ]