Cast Steel Bolster (For Modified Separate Type Pivot) To Rdso Drawing No- Wd-89067-S/ 4, Alt.13, Item No.1 To 3. Material As Per Drawing Conforming To Rdso'S Specification Wd-21-Casnub- 22Nlb-Bogie-93 (Rev.3) Of May'26. [ Warranty Period: 72 Months After The Date Of Delivery ] ]