T-304 S/S Nonmagnetic Stainless Steel Exhaust Piping Tubing 4 Feet long OD:4''/102mm Made of High Quality T-304 Stainless Steel; Raw Surface (very easy to weld on). Excellent resistance to corrosion and oxidation resistance Outter Diameter: 4''/102mm; Thickness: 0.05"/1.2mm; 4FT/1.2m Long Straight Pipe Package Including: 1X 4" T-304 S/S Exhaust Pipe Application: Universal 4" outside diameter exhaust pipe