Supply of Cut Off Angle Cock With Vent For Air Brake On Wagons. Drawing No. : Rdso, S Drg. No. Wd-88123-S-01, Alt. 2, Item No. 1 To 13. Material And Specification : As Per Drawing And Conforming To Rdso, S Spec. No. 02-Abr - 02, Amend. No. 4 Of Sept. 2016.. Cut Off Angle Cock With Vent For Air Brake On Wagons. Drawing No. : Rdso, S Drg. No. Wd-8812 3-S-01, Alt. 2, Item No. 1 To 13. Material And Specification : As Per Drawing And Conforming To Rdso, S Spec. N O. 02-Abr - 02, Amend. No. 4 Of Sept. 2016. Warranty Period: 36 Months After The Date Of Delivery