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