Check Size: 1/4" x 3/8" female to female NPT thread hex nipple. NOTE: Thread size is a nominal pipe size and it does not represent the actual diameter, please check the size you need before ordering. (1/4" NPT Thread actural ID about 1/2inch, 3/8" NPT Thread actural ID about 5/8inch.) Premium Material: The connectors are made of solid brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability. Strong and durable, long service life. Clean Threads: High quality smooth and deep threads allow the fittings to bite better, tight threads, not easy to slip. Multi-Function: This female pipe coupling adapter is a great tool for both DIYers and professional plumbers! It can apply to water, oil and fuel, and be used to connect various pipes as well as air tools; it can also be used with grease, fuels, LP and natural gas, refrigeration, instrumentation and hydraulic systems in low and medium pressure pipe line connections. Features: Operating temperatures range from -53 to 121℃ (-65 to 250 ℉). Woking Pressure: 150PSI.

- High strength, high hardness premium solid brass with thick wall, more durable than iron and iron galvanized pipe fittings.

- Excellent performance: Precisely milled, threads are tighter and deeper, not easy to slip; smooth threads will reduce the resistance during installation, saving time and improving efficiency.

Tips: For better sealing, we suggest that all fittings must be used with sealing tape.

Package Contents: 2 pack 3/8 inch female x 1/4 inch NPT female brass pipe fittings