Merit Brass NLBS114-0806-10 Hex Bushing, Lead Free Pipe Fitting (Pack of 10), 1/2" NPT Male X 3/8" NPT Female Hex bushing for connecting pipes of different sizes Male and female National Pipe Taper (NPT) threads for connecting two pipes Made from lead-free brass for higher corrosion resistance than steel Relative softness of metal enables tighter seals and greater ease in installation Manufactured to standards NSF/ANSI 61, AB1953, and S.152 for lead-free quality assurance