Stainless Steel 316 Pipe Fitting, Hex Head Bushing, Class 1000, 1" NPT Male X 3/4" NPT Female Bushing for connecting pipes of two different sizes Male and female National Pipe Taper (NPT) threads for connecting different types of pipe Made from stainless steel 316 for strength Higher corrosion resistance than stainless steel 304 Conforms to specifications ASTM A182, ASME SA182, and ANSI B16.11 for quality assurance