supply of steel tubes galvanized isi marked to is: [steel tubes galvanized isi marked to is:1239/(part-i)/2004 in random lengths of 4 to 7 mtrs. screwed at both ends as per is:554/1999, socketed at one end and other end protected with plastic protector, sizes: 20 mm dia. and medium class. socket conforming to is:1239/part 2/2011 with latest amendment.] , steel tubes galvanized isi marked to is:1239/(part-i)/2004 in random lengths of 4 to 7 mtrs. s crewed at both ends as per is:554/1999, socketed at one end and other end protected with plastic protecto r, sizes: 20 mm dia. and medium class. socket conforming to is:1239/part 2/2011 with latest amendment. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: m ax 8 lacs ] ]