The John Guest Male Connector makes connecting tubing to female BSPP threads quick and easy. Fittings are manufactured in gray 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 gases and can be used on CO2 /nitrogen beverage gas lines, pneumatics, vacuum as well as other applications. Features and benefits:    For use with plastic or copper OD size tubing   Acetal body, nitrile O-ring Quick and easy connection/disconnection Food Quality, suitable for potable liquids and pure water NSF51 and NSF61 listed Lead free materials Can be used for air/pneumatic and vacuum applications Suitable for inert gases, CO2 and nitrogen beverage lines   Working pressure and temperature:   150 psi at 68° F 100 psi at 150° F