Features Designed for use on all pneumatic circuits and features a quick connect/disconnect positive seal. Push-in design requires no special tools. For use with nylon, polyethylene, and polyurethane tubing and suitable for use in air, water, and oil applications. Tube Fitting Material / Nickel Plated Brass Fitting Connection Type / Tube Tube Size / 3/8 in Temp. Range / 0 Degrees to 160 Degrees F Gasket Material / Nitrile Rubber