Galvanized Steel Pipes & Tubes Isi Marked In Length Of 6 Meters, Screwed At Both Ends, S Ocketed At One End And Other End Screwed Protected With Plastic Protector, 15 Mm Nb, Medium Class. Sockets Shall Also Be Isi Mark. Material And Specification -- Is: 1239 (Pt. 1): 2004 (Rev. 6), Amend. No. 6 Of June 2021 For Tube; Is: 1239 (Pt. 2): 2011 (Rev. 5), Amend. No. 3 Of March 2016 For Socket; And Is: 554:1999 (Rev. 4) , Amend. No. 1 Of Oct. 2009 For Screw. [ Warranty Period: 30 Months After The Dat E Of Delivery ] ]