2.5 Inch Extruded 304 Stainless Steel Elbow 90 Degree Pipe 3mm Thick 2.50" O.D. Extruded 304 Stainless Steel Elbow 90 Degree Pipe, Polished Finishing (no coating, can be welded without any issue) These are heavy duty Extruded SS Tube 3mm (11 Gauge) Thick Won't Crack, can be welded to make many custom Manifolds, headers for Extreme High Power applications.