PowRyte Solid Brass Fiting, Female Coupling Set - 1/4-Inch NPT x 1/4-Inch NPT, 5-Pack Durable solid brass construction is resistant to corrosion and long-lasting Two 1/4'-18 NPT female thread parts on both ends for connecting two 1/4" male NPT threaded parts together Hex design for easy wrench installations 5-Pack