4" Weld Elbow 90°, Stainless Steel 304, Sanitary, Tubing, Fitting, Polished90 degree 4" Weld On Elbow, Stainless Steel 304 Stainless Steel weld on elbows are primarily used to weld two lengths of piping together to create a solid pipeline with a change in direction. Stainless steel elbows and piping are perfect for use in any food service or industrial setting, and are a preferred method for transferring a large variety of liquids and gases. These elbows are 4" in diameter, and set at a 90 angle. They are manufactured out of