Stainless Steel 316 Cast Pipe Fitting, Hex Bushing, Class 150, 2" NPT Male X 1" NPT Female Bushing for connecting pipes of two different sizes Male and female National Pipe Taper (NPT) threads for connecting pipes Made from stainless steel 316 for strength Higher corrosion resistance than stainless steel 304 Class 150 fittings conform to standards ANSI B1.20.1 and ISO 49 for quality assurance