About This Design:High-pressure resistance, not easy to fall off, can withstand the strong pressure does not release the buckle use for a long time.Freely change pipeline direction after using this air line quick connect fittings. Widely used in Braking System, Fuel System, Cooling System.Plastic and Nickel-plated Copper Push to Connect Fittings has corrosion resistance, ductility at high temperatures, and low magnetic permeability, can withstand pressures up to 0 to 145 Psi and temperatures up to 32 to 158 °F (0 to 70 °C)Easily insert or pull out the trachea without any tools.With a variety of sizes to choose from, there is no need to worry about not finding the size you need.