supply of semi permanent couplersemi permanent coupler,semi permanent coupler end-b conforming to rdso specification no.61-b-36, rev 68-1 with am endment 1 of oct-2016 and to schaku drg no.40.587 (0) consisting of 6 items: [1] intermediate tube to schaku d rg no.40.586.01.01(2) [2] air pipe coupling (complete) to schaku drg no.40.587.04(3) [3] draw and buff gear to s chaku drg no.40.586.06(2) [4] bearing bracket with support to schaku drg no.40.588.07 (2) [5] centering device (sub assy) schaku drg no.40.318.13(4) [6] centering carrier (sub assy) to schaku drg no.40.1000.10(2) [ war ranty period: 30 months after the date of delivery ]