Stainless Steel 316 Pipe Fitting, Reducing Coupling, Class 1000, 1-1/2" X 1-1/4" 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 specifications ASTM A182, ASME SA182, and ANSI B16.11 for quality assurance