Supply of Isolating Cock With Vent For Bogie Mounted Air Brake Coaches. Drawing No. : Rdsos Drawing No Sketch - 98013, Alt. Nil, Item Nos. 1 To 12 In Assembled Condition. Material And Specification : As Per Drawing And Rdsos Specification No. 02-Abr-02, Amend. 4 Of Sept. 2016, Appendix- I. Warranty Period: 36 Months After The Date Of Delivery