Supply Of Bolster Column Outer Gibs Liner Of Size 75 X 17 X 1.6mm. Drawing No. : Crs Drawing No. Jhs/sk-2441, Sl No. 09. Material And Specification : Silico Magnese Steel Conforming To Is :3885 Part 1: 1992 Rev. 2, Amend. No. 1 Of Jan. 1995, Grade : Iv..