supply of tube m.s.galvanised medium grade 25mmtube m.s.galvanised medium grade 25mm,tube m.s.galvanised medium grade 25mm duly isi marked galvinised mild steel tubes e lectrical resistences welded (erw)/high frequency induction welded (hfiw) / hot finished welded (hfw ) confirming to is:1239 (part-i)/1990 (fifth revision) with amdt. no.1 to 5. screwed at both ends as per is:554/1985, socketed at one end and other end protected with plastic thread protector. the socket co nfirming to is:1239 (part-ii) / 1992 (fourth revision) with amdt. no. 1 in random length of 4 to 7 mtrs. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ] => limited