supply of mild steel tube black, plain ended, electric resistance welded (shop no.03) , mild steel tube black, plain ended, electric resistance welded ( erw ) medium, ( clause 6.3 ) , out side diameter - 140.8 mm to 138.5 mm ( clause 8.1, table no.2 ), wall thickness 4.8 mm ( clause 9 (a ) ), random length 4 to 7 mtr ( clause 11.1 ) is : 1239 (part 1)/1990. party to submit oem / authorization & nabl approved lab test certificate with warranty. sample to be get approved bulk supply. (shop no.03) [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]