we are ShanDong Vantage International Trade Co.,ltd in china , my name is amy , we specialzied in different kinds of steel products .like galvanized steel pipe(GI pipe) , channel iron , angle steel bar , H-beam, pattern and rolling and flate plate and so on. we have standard sizes , also can customize for you . any need , contact me freely .Whatsapp: +86 18766128994Skype: amy yangWechat :424007994Contact me freely, I will provide you the quotation asap .