seamless pipe Certificate:API & ISO Size:168-914Thickness:5-60mm Standard:ASTM,GB,EN,DIN, seamless steel pipe Details:seamless pipeCertificate:API & ISO Size:168- ... been doing trade for many years, the products's quality is very high, and the price is compective in the market, If ... been doing trade for many years, the products's quality is very high, and the price is compective in the market, If ...