Round Quadrant - Volume Damper | Round Damper Ring | 12" Galvanized Steel Metal Round Duct Ring is Compatible with Duct 12" Height_18in and the full outer portion

and the full outer portion is double layered

electrical components

A: Black Grilles Always Look Sharp And Never Show Dirt & Dust Marks

+ Product Details Size – 10" X 10" is the size for the drywall opening measurement only

+ Product Details Size - 20"w X 10"h X 2"d (for duct opening measurement only)

Round Quadrant - Volume Damper | Round Damper Ring | 12" Galvanized Steel Metal Round Duct Ring is Compatible with Duct 12" Height_18in and the full outer portion+ Product Details Size & Compatibility The 12" round quadrant volume damper is compatible with duct 12" Superior Quality Made in the USA. Our manual adjuster damper quadrant is made of high quality galvanized sheet metal with crimped ends (snap lock design) for easy fitting and secure connection Applications This circular volume control damper plate is used to stops or regulates the flow of air inside a duct, chimney, vav box, air handler, or other