supply of procurement of tube steel seamless heavy grade nominal bore 25 mm etc..procurement of tube steel seamless heavy grade nominal bore 25 mm etc..,tube steel seamless heavy grade nominal bore 25 mm black plain ends to is 1239 ( part1): 2004, amendment no.4 june 2010 ( pertains to mild steel) table 5 and plain e nds. outside diameter ( minimum 33.3 mm and maximum 34.2 mm), wall thickness 4 mm, nomi nal mass of steel tubes ( plain end) 2.930 kg/ mtr + 10%. lenth 06 mtrs. material should be heavy duty seamless pipe, black. conditions:- totally rust free from inside & outside, fitted with protective cap at open ends. [ warranty period: 30 months after the date of delive ry ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ] => limited