We,Hunan Shinestar Steel Group specializes in this field for 20 years in China. Steel Pipe supply maintains a full line of sizes as follows: -Carbon/ Alloy seamless steel pipe, -ERW/LSAW/DSAW/SSAW steel pipe , -hollow section: square,rectangular pipe . Specifications include API,ASTM, DIN,EN and others. Your purchase will be complimented with courteous,professional and economical guidance and service. Any enquiry will be appreciated!