Stainless Steel 304 Pipe Fitting, Reducing Coupling, Class 1000, 1-1/2" X 1" NPT Female Reducing coupling for connecting and extending pipes of different sizes Female National Pipe Taper (NPT) threads for connecting pipes Made of stainless steel 304 for strength and greater ease in welding than 302 grade steel Lower carbon content for greater resistance to corrosion Conforms to specifications ASTM A182, ASME SA182, and ANSI B16.11 for quality assurance