Closmos 45 Degree Street Elbow is manufactured from premium 316 stainless steel offering enhanced mechanical strength and corrosion resistance. has a female National Pipe Taper (NPT) threaded connection and a male NPT threaded connection. This 45-degree street elbow fitting, or "street ell," connects two pipes, one with a male end and the other with a female end, at a 45-degree angle to change the direction of flow between pipes. offering enhanced mechanical strength and corrosion resistance.