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