Tenders for Supply of Flat Bottom Rail Mill Section Mm 30 Lbs With Standard Length. M.S. Channel To Is 808-1989/Is-2062-1992 Size 250 X 80 Mm. Minimum Length Should Not Be Less Than 3 Mtrs.. Ms Channel To Size: 75 Mm X 40 Mm X 6 Mm Thick, To Is: 2062.