... GP201 202 301 304etc Cold-Rolled 201/304 Stainless Steel Pipe,Austenitis Stainless Steel ,100*100 Steel Square Pipes,Steel ... Steel Tubing,AISI/ASTM-A554 304 Stainless Steel Pipe, Hot-Rolled 201/304 Stainless Steel Tube,Clod Drawing ... Current, Hydrostatic Mechanical, Mechanical Test, Chemical Composition Analysis , ISO Quality Management System Certification ,MTC(5) Tolerance:OD: ±0.15mm Thickness ...