304 seamless tube seamless / weled tube OD:6mm-750mm T:0.3-75mm Finish: POLISH,ACID, ... .At present, We export our products to Spain, Germany, France, Turkey, USA, Canada, Taiwan, Korea, Vietnam, India , Pakistan, Iran, and so ... ,317,317L,309,309S,310,310S,430,409specificationRoundSquarerectangle 304 seamless tube