supply of steel tubes-galvanized isi is:1239(pt-1)/2004 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 50 mm. , steel tubes-galvanized isi is:1239(pt-1)/2004 in random length of 4 to 7 meters, screwed at both end s as per is:554/1999 rev-4 amndt. 1, screwed at both ends and socketed at one end and other end protected with pl astic thread protectors light coated class medium, nominal bore size 50 mm. [ warranty period: 30 months after th e date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]