supply of improved high tensile tight lock center buffer coupler with aar-h type head and balanced draft gear.improved high tensile tight lock center buffer coupler with aar-h type head and balanced draft gear.,improved high tensile tight lock center buffer coupler with aar-h type head and balanced draft gear for fitment on bg passenger coaches confirming to rdso specification no. rdso/2011/cg-03 (rev.-3) consisting of 6 items, sl. no. 1 tight lock coupler head aar-h type with main pin. qty. 1 no., sl. no. 2 balance draft gear. qty. 1 no., sl. no. 3 supporting device with fasteners. qty. 1 no., sl. no. 4 manual uncoupling device. qty. 1 no., sl. no. 5 base plate with fasteners. qty. 1 no. and sl. no. 6 support plate with fasteners. qty. 1 no. material & specification: rdso/2011/cg-03 (rev.-3). [ warranty period: 84 months after the date of delivery ]