Tube M.S.Galvanised 20Mm Medium Class Duly Isi Marked Galvanised Mild Steel Tubes El Ectrical Resistances Welded (Erw)/High Frequency Induction Welded (Hfiw)/Hot Finished Welded (Hfw) C Onfirming To Is:1239 (Part-I)/1990 (Fifth Revision) With Amdt. No.1 To 5 Screwed At Both Ends As Per Is:5 54/1985, Socketed At One End And Other End Protected With Plastic Thread Protector. The Socket Confir Ming To Is:1239 (Part-Ii)/1992 (Fourth Revision) With Amdt. No. 1 In Random Length Of 4 To 7 Mtrs. [ War Ranty Period: 30 Months After The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitted: Max 8 Lacs ] ]