Everflow BRBU0381-NL 3/8 Inch Male NPT X 1/4 Inch Female NPT Brass Lead Free Bushing, Fitting with Hexagonal Head, Brass Construction, Higher Corrosion Resistance Economical & Easy to Install Hexagonal Bushing for Connecting Pipes of Different Sizes Female National Pipe Taper (NPT) Threads on One End and Male NPT Threads on the other for Connecting Different Types of Pipe Made from Brass for Higher Corrosion Resistance than Steel NPT Thread for Creating Tighter Seals Than Straight Threads More Economical Than Steel; Certified to Meet NSF/ANSI 61-8 Standard for Quality Assurance