AISI Stainless Steel 201 Pipe: 1.Size: 9.5mm-219mm 2.Thinkness: From 0. ... . 3.material in SS201, SS301, SS304,SS316 AISI Stainless Steel Pipe:1.Diameter: 19mm, 20m, 22mm, 25.4mm, 28mm, 31. ... ISO9001-2000, Products quality certificate etc,9. it's good for house, building, shopping mall, inside or outside projects.10. Testing ... pictures:12. Pack photos:13: Factory pictrue: Hollow Section Steel Round Pipe