For connecting metric OD tubing sizes to female threads. Makes installations quick and easy. JG Push-fit technology makes connecting tubing quick and easy. Stem easily inserts into JG Push-fit fitting to make a permanent swivel connector. Fittings are manufactured in black acetal with food grade nitrile O-ring, making them especially suitable for applications involving foodstuff and potable liquids. They are also suitable for air and inert gasses and can be used on CO2 /nitrogen beverage gas lines, pneumatics, vacuum as well as other applications.