Stainless Steel 316 Cast Pipe Fitting, Reducing Coupling, Class 150, 1-1/2" X 1/2" NPT Female Reducing coupling for connecting and extending pipes of different sizes Female National Pipe Taper (NPT) threads on both ends for connecting male pipes Made from stainless steel 316 for strength Higher corrosion resistance than stainless steel 304 Meets standards ANSI B1.20.1 and ISO 49 for quality assurance