supply of semi permanent coupler end b conforming to rdso specification no.61-b- 36, rev 68-1 with amendment no. 1 of october 2016 and to m / s.escorts make drg no:sk- 751 consisting of 5 items ( 1 ) intermediate tube.to escorts drg.no.sk-754 ( 2 ) air pipe coupling ( complete ) .to escorts drg.no.sk-198 ( 3 ) draw and buff gear to escorts drg.no.sk.752 ( 4 ) centering carrier ( sub assy ) .to escorts drg.no.sk-825 ( 5 ) centering device ( sub assy ) .to escorts drg.no.sk-756 or m / s.wsf make or m / s.sanrok enterprises make to their equivalent drawing for emu / memu application [ warranty period: 30 months after the date of delivery ] => limited