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 che mical curing process thin-walled flexible elastomeric conforming to rdso spec.no. elr s/spec/elc/0019, (rev.4) feb -2018. note: 1) material should be supplied by rdsos apprrove d oem or their authorized dealers with tender specific authorization letters from oem only to quote wi th documentary evidence. 2) material should be supplied in equal quantity of red, yellow, blue & black colour. [ warranty period: 30 months after the date of delivery ] ]