Stainless Steel 304 Cast Pipe Fitting, Reducing Coupling, Class 150, 1/2" X 1/4" NPT Female by Merit Brass Reducing coupling for connecting and extending pipes of different sizes Female National Pipe Taper (NPT) threads on both ends for connecting male pipes Made of stainless steel 304 for strength Lower carbon content for greater resistance to corrosion Meets standards ANSI B1.20.1 and ISO 49 for quality assurance