Glad to know you and your company. This is jason from a steel pipe company . We mainly supply steel pipe for smls and welded type , for square steel pipe for carbon and alloy steel . If  you there have need , or want to enlarge your market , feel free contact me , we here have many years production and export  experience . For the quality all follow the relative standards  seriously. Any details want to know , feel free contact  me . Mr Jason SALES DIRECTO CangZhou ZhongShun Steel Pipe Trade  CO.,LTD Add: Cangzhou Custom  House Building,Cangzhou City,           Hebei  Province,China Fax: +86-317-2040186   Cell: +86-15297376059（whatsapp also) Skype: caohongwei03 Email: jason@zssteeltube.com http://www.czpipeline.com/   https://www.facebook.com/jasoncao2003