Steel Tubes Galvd. Isi Marked To Is: 1239/Pt-1/2004, Amendment No.4 June 2010 In Rand Om Length Of 4-7 Mtrs. Screwed At Both Ends As Per Is: 554/1999, Socketed At One End And Other End Protected With Plastic Protector, Nominal Bore 20Mm Heavy Classes. ]