supply of sanrok parts , charging unit as per sanrok part .no. 2ed-254-3523 for automatic smoke/fire detection with alarm syste m for ac coaches confirming to rdso spec.no. rdso/2008/cg-04(rev-6) or latest. [ warranty period: 30 months aft er the date of delivery ] ] , brake module as per sanrok part no. 2ed-254-4387 for automatic smoke/fire detection with alarm system for ac coaches as per rdso spec. no rdso/2008/cg-04.(rev-6) or latest. [ warranty period: 30 months after the date of delivery ] ] , green led for break indication as per sanrok part no. 2ed-254-5106 for automatic smoke/fir e detection with alarm system in ac coaches as per rdso spec. no rdso/2008/cg-04 (rev-6) or latest. [ w arranty period: 30 months after the date of delivery ] ] , flasher light as per sanrok part no. 2ed-255-1972, for automatic smoke/fire detection wit h alarm system for ac coaches as per rdso spec. no. rdso/2008/cg-04 (rev-6) or latest. [ warranty perio d: 30 months after the date of delivery ] ] , relay and communication card of vesda compact laser detector (vlf) as per sanrok part n o 2ed-255-4974 for automatic smoke/fire detection with alarm system for ac coaches conforming rdso spec no . rdso/2008/cg-04. rev.06 (or)latest. [ warranty period: 30 months after the date of delivery ] ] , display card as per sanrok pard no. 2ed-255-9001a for automatic smoke/fire detection with alarm system in ac coaches as per . rdso/2008/cg-04 rev.06 or latest. [ warranty period: 30 months after the date of delivery ] ]