Everflow BRCP0012-NL 1/2 Inch Two Female NPT Threaded Lead Free Brass Coupling, Connecting Pipes and Fittings, Brass Construction, Higher Corrosion Resistance, Economical & Easy to Install Lead-Free Brass is Comparable in Strength to Stainless Steel and it is More Corrosion Resistant Brass Body Constructed Manufactured to Standard ASTM B-584-06 for Lead-Free Quality Assurance Female National Pipe Taper (NPT) Threads for Connecting to Male Threaded Pipes It Connects Two Pipes with the Same Diameter in a straight run: Certified to Meet NSF/ANSI 61-8 Standard for Quality Assurance