Push To Connect Fittings - 1/4 Inch Tube Od Pneumatic Air Fittings - 5Pcs ?High Quality Construction?: These air hose fittings are made from high-quality brass, with both CA360 and CA377 brass casting, ensuring durability and long-lasting performance. ?Wide Operating Range?: With a working pressure range of vacuum to 250psi and a working temperature range of -40? to +200?, these air line quick connect fittings are highly versatile and can be used in a variety of different settings and conditions. ?Effortless Integration?: TL TOOLEGIN air line fittings can be effortlessly incorporated into existing pneumatic systems since they work seamlessly with commonly used air fittings like quick connect and push-to-connect fittings, making integration a breeze within pneumatic setups. ?Easy to install?: All fittings can be sealed by pushing the tube firmly into the fittings, and they are also simple to be removed from the tube. ?Wildly Usage?: The air brake union assortment kit can be used with air systems, copper tubing in air brake systems, which is perfect for garages, workshops and so on.