supply of high tensile aar h type tight lock coupler complete with transition screw coupling and balance draft gear and all other associated components as per rdso specification rdso/2009/cg-22 rev.03 for fitment on bg passenger coaches.high tensile aar h type tight lock coupler complete with transition screw coupling and balance draft gear and all other associated components as per rdso specification rdso/2009/cg-22 rev.03 for fitment on bg passenger coaches.,high tensile aar h type tight lock coupler complete with transition screw coupling and balan ce draft gear and all other associated components as per rdso specification rdso/2009/cg-22 rev.03 for fitment on bg passenger coaches. [ warranty period: 30 months after the date of delivery ] ]