supply of cable with copper conductor suitable for rolling stock application 25sq.mm, red, yellow, blue &black colour, electron beam irradiation curing process or chemical curing process thin walled flexible elastomeric conforming to rdso spec.no.elrs/spec/elc/0019,(rev.4) feb -2018. note: 1) material should be supplied by rdsos apprroved oem or their authorized dealers with tender specific authorization letters from oem only to quote with documentary evidence. 2) material should be supplied in equal quantity of red, yellow, blue & black colour.cable with copper conductor suitable for rolling stock application 25sq.mm, red, yellow, blue &black colour, electron beam irradiation curing process or chemical curing process thin walled flexible elastomeric conforming to rdso spec.no.elrs/spec/elc/0019,(rev.4) feb -2018. note: 1) material should be supplied by rdsos apprroved oem or their authorized dealers with tender specific authorization letters from oem only to quote with documentary evidence. 2) material should be supplied in equal quantity of red, yellow, blue & black colour.,cable with copper conductor suitable for rolling stock application 25sq.mm, red, yellow, blue &black colour, electron beam irradiation curing process or chemical cu ring process thin walled flexible elastomeric conforming to rdso spec.no.elrs/spec/elc/0 019,(rev.4) feb -2018. note: 1) material should be supplied by rdsos apprroved oem or their a uthorized dealers with tender specific authorization letters from oem only to quote with documentary evi dence. 2) material should be supplied in equal quantity of red, yellow, blue & black colour . [ warranty period: 30 months after the date of delivery ] ]