Source 304 stainless steel 45 degree internal and external threaded elbow 4/1 inch water pipe fittings 135 degree threaded joint on m.alibaba.com
Amazon.com: X AUTOHAUX OD 4 Inch 45 Degree Mandrel Bend Elbow SS304 Stainless Steel Bend Tube Exhaust Elbow Pipe for Car Modified Exhaust System 4" Piping Silver Tone : Automotive
4" SS304 45° Elbow - 1.5D / 6" CLR - 16GA / .065" - With Leg