supply of set of bearings consisting of 1 no. of cylindrical roller bearing type nu 312 ecjc3 of skf make or equivalent of rdso approved makes mentioned in the bill of material i.e., ( a ) m / s skf / germany / austria, ( b ) m / s fag / germany / india and ( c ) m / s nsk / japan and 2 nos. of angular contact ball bearing type 7312 becbj of skf or equivalent of rdso approved makes mentioned in the bill of material i.e., ( a ) m / s skf / europe / india, ( b ) m / s fag / germany and ( c ) m / s nsk / japan of amendment no.1 of rdso spec no. rdso / pe / spec / ac / 0056-2004 ( rev-0 ) .%u201d note: offers from oems or from their regular authorized dealers along with valid authorization letter from oems will be accepted [ warranty period: 30 months after the date of delivery ]