Suitable for double joint flares fittings, can also be used in oil and systems, pipelines, refrigeration and vacuum applications Featuring a robust flange connection, it a secure and leakproof seal for your hydraulic tubing Crafted from brass for resistance, high temperature ductility, and long lasting durability : Extend your copper tubes with our butt set fittings The pipe connector works seamlessly with aluminum, copper, brass, and welded steel tubing, making it perfect for plumbing and HVAC projects, Manufacturer: Fentency