supply of high tensile aar-h type tight lock coupler with transition screw coupling for fitment on bg passenger coaches of indian railways and balanced draft gear, un-coupling devices, supporting device and other related components as per spec no rdso/2009/cg-22 rev-01.high tensile aar-h type tight lock coupler with transition screw coupling for fitment on bg passenger coaches of indian railways and balanced draft gear, un-coupling devices, supporting device and other related components as per spec no rdso/2009/cg-22 rev-01.,high tensile aar-h type tight lock coupler with transition screw coupling for fitment on bg passenger coaches of indian railways and balanced draft gear, un-coupling devices, supporting de vice and other related components as per spec no rdso/2009/cg-22 rev-01. [ warranty period: 84 months after the date of delivery ] ]