4" Clinch Base Side Metal Takeoff Material_Steel You can use these couplings

You can use these couplings for all things plumbing including drinking water

+ Product Details Size – 8" round duct opening

Chemical Composition: 5% Silver - 6% Phosphorus - 89% Copper - Brazing Temperature: Solidus Temperature: 1190°F - Liquidus Temperature: 1460°F

4" X 14" Is The Size For The Duct Opening Measurement Only

4" Clinch Base Side Metal Takeoff Material_Steel You can use these couplings+ Product Details Size & Compatibility The 4" clinch base side metal take off is compatible with duct 4" Superior Quality Made in the USA. Our clinch base side metal take off is made of high quality galvanized steel metal for durability and rust prevention. It has crimped ends for easy fitting and secure connection to consecutive duct joints Applications The Clinch base means its secured with clinching tabs. These tabs dig into the main duct when you