Trenton Pipe SS304-60230 Pipe Fitting, Class 150, Cast Stainless Steel Grade 304, 90 Degree Street Elbow, 3" NPT Female x Male Threads A 90 Degree Street Elbow is used to change the direction of flow, one end is NPT-Female the other end connection is NPT-Male threads Quality Precision Investment Castings made of 304 Stainless Steel to ASTM A351 Standards USA, Standard Taper Pipe Threads, NPT-Female x NPT-Male to ANSI B.120.1 Standards