supply of procurement of improved high tensile tight lock centre buffer coupler......procurement of improved high tensile tight lock centre buffer coupler......,procurement of improved high tensile tight lock centre buffer coupler with aar -h- type head and balanced draft gear (without crash element) for fitment on bg passenger coaches of indian railways specification no. rdso / 2011/cg-03. rev.3 or latest. warranty schedule of item: as per specification no. rdso / 2011/cg-03. rev.3, warranty is 72 months from the date of fitment /84 months from the date of supply whichever is earlier. [ warranty period: 30 months after the date of delivery ]