Tefen Nylon 66 Hose Fitting, Adapter, Gray, 1/4" Hose ID x 1/4" NPT Male (Pack of 10) Adapter for connecting hose or fittings of different types Connects to hose on one end and female NPT threaded connections on the other Nylon 6/6 for lightweight, strength, and resistance to corrosion from most chemicals and solvents Maximum operating pressure of 200 psi (14 bar) at 68 degrees F (20 degrees C) in a temperature range of -5 to +230 degrees F (-20 to +110 degrees C), subject to application Meets NSF/ANSI 61 standard