Top Outlet Ceiling Diffuser Box | 12" X 12" X 8" | Galvanized Steel Metal Box Is Compatible With Duct 8" Merv 8 + Product Details Size &

+ Product Details Size & Compatibility – The size of galvanized sheet metal oval stack head with collar is 12" X 6" - 6" and it is compatible with Duct 6"

+ Product Details Size – 34"w X 12"h is the size for the duct opening measurement only

Customize the arm dimensions to perfectly fit your air conditioner unit for a seamless and secure installation process

Actual Filter Size – 27 3/4"w x 21 3/4" x 1"

Top Outlet Ceiling Diffuser Box | 12" X 12" X 8" | Galvanized Steel Metal Box Is Compatible With Duct 8" Merv 8 + Product Details Size &+ Product Details Size & Compatibility The size of the side round ceiling box is 12" X 12" X 8" and it is compatible with duct 8" Premium Quality Made in the USA. Our Galvanized Duct Box is made of high quality 26 Gauge galvanized sheet metal for durability. It features a snap lock design for easy fitting and a secure connection. Applications The C box duct with drywall flange, round connects to vent register diffuser, airflow conditioning ceiling