supply of steel tube galvanized isi marked in random length of 4 to 7 mtrs. screwed at both ends, socketed at one end and other end protected with plastic protector, nominal bore 15mm dia, medium class, sockets shall also be isi mark.material and specification is:1239 ( pt.1 ) / 2004 ( rev.6 ) amend - 4 of june 2010 for tube, is:1239 ( pt.2 ) / 2011 ( rev.5 ) amend- 1 of sept 2012 for socket and is:554 ( rev.4 ) / 1999 with amend- 1 of oct.2009 for screwed.steel tube galvanized isi marked in random length of 4 to 7 mtrs. screwed at both ends, socketed at one end and other end protected with plastic protector, nominal bore 15mm dia, medium class, sockets shall also be isi mark.material and specification is:1239 ( pt.1 ) / 2004 ( rev.6 ) amend - 4 of june 2010 for tube, is:1239 ( pt.2 ) / 2011 ( rev.5 ) amend- 1 of sept 2012 for socket and is:554 ( rev.4 ) / 1999 with amend- 1 of oct.2009 for screwed., steel tube galvanized isi marked in random length of 4 to 7 mtrs. screwed at both ends, socketed at one end and other end protected with plastic protector, nominal bore 15mm dia, medium class, sockets shall a lso be isi mark.material and specification is:1239 ( pt.1 ) / 2004 ( rev.6 ) amend - 4 of june 2010 for tube, is:1239 ( pt.2 ) / 2011 ( rev.5 ) amend- 1 of sept 2012 for socket and is:554 ( rev.4 ) / 1999 with amend- 1 of oct.2009 for scr ewed. [ warranty period: 30 months after the date of delivery ]