Supply Of Steel Tubes-galvanized Isi Is:1239pt-1/2004 Amndt-9 In Random Length Of 4 To 7 Meters, Screwed At Both Ends As Per Is:554/1999 Rev-4 Amndt. 1, Screwed At Both Ends And Socketed At One End And Other End Protected With Plastic Thread Protectors Light Coated Class Medium, Nominal Bore Size 20 Mm..