... 1.carbon steel bend with ISO CE certificates 2.18-610mm 3.ISO9001,ISO14001,CE 4.carbon steel 5.high quality.competitive carbon steel ... /2''--72''(Seamless :1/2''--24'',Butt Welding:26''--72'')3MaterialCarbon steel,Stainless steel,Alloy Steel4Material GradesA234 WPB,A106 ... F304HMTP316L,A358 etc5TechnicsPushing,Forged,Pressing,Cold Drawn,Casting,etc6ShapeEqual,Round,Reducing7ConnectionRF,FF,MF,FMF,SRF, ...