supply of single row cylindrical roller bearing of size (55x120x29) mm similar to type sf nu-311 etc.single row cylindrical roller bearing of size (55x120x29) mm similar to type sf nu-311 etc.,ingle row cylindrical roller bearing of size (55x150x29) mm similar to type skf nu-311 ecj m ake as per bill of material of rdso spec. no. rdso/pe/spec/ac/0054-2003 (rev-0), with amdt. no 1&2 i.e (i) m/s skf (germany/austria) (ii) m/s fag (germany/ india) (iii) m/s nsk (japan). [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]