... .material in SS201, SS301, SS304,SS316 AISI Stainless Steel Pipe:1.Diameter: 19mm, 20m, 22mm, 25. ... Products quality certificate etc,9. it's good for house, building, shopping mall, inside or outside projects ... .10. Testing report as follows: STEEL NOCOUNTRYSTANDARDCSiMnPSNiCrN≤ ≤≤≤≤0Cr18Ni9CNGB0.07120.0350.038.00-11.0017 ... Pack photos:13: Factory pictrue: Hollow Section Steel Round Pipe