Stainless Steel 304 Cast Pipe Fitting, Hex Bushing, MSS SP-114, 3/8" NPT Male X 1/4" NPT Female Hex bushing for connecting pipes of two 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 standards MSS SP-114, ANSI B1.20.1, and ASTM A351, for quality assurance