supply of 50 sq.mm ,blue colour, electron beam irradiation curing process or chemical curing process thin walled flexible elastomeric cable with copper conductor suitable for rolling stock application conforming to rdso spec. no. elrs/spec/elc/0019,rev.4,feb-2018,1.8 kv grade. note:1) item/type/model/make/brand from the manufacturer/suppliers as approved by rdso shall only be considered. 2. cables shall be supplied in coils of 500 metres length, and left overquantity in multiples of 100 metres with a tolerance of +/-5% on the length. 3. firm shall indicate the curing process (e-beam irradiation (or)chemical curing) in their offer.