... OriginTianjin, China (Mainland)Brand NameTPCOModel NumberDIN JIS GB BIS ASTMCertificationISOWelding Line TypeERWThickness0.3-25mmshapesquareGradeASTM A213, A269, A312, A789, B163, B407Payment & Shipping ... have any definite need, be free to tell me. and I will provide you the high qualified 316 rectangulare steel pipe ...