Brennan 5405-04-08-SS Stainless Steel Pipe Fitting, Reducing Adapter, 1/4" NPT Male X 1/2" NPT Female Reducing adapter for connecting two pipes of different sizes Male National Pipe Taper (NPT) threads on one end and female NPT threads on the other end Made from stainless steel 316 for resistance to chloride corrosion Higher corrosion resistance than stainless steel 304 Meets SAE J514 standard for quality assurance