Side Outlet Ceiling Diffuser Box | 8" X 8" X 8" | Galvanized Steel Metal Box is Compatible with Duct 8" Material_Anodized Aluminum and smooth surface

and smooth surface

+ Product Details Size - 28"w X 30"h is the size for the duct opening measurement only

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

+ Product Details Size - 16"w X 16"h is the size for the duct opening measurement only

Actual Filter Size – 31 3/4"w x 31 3/4" x 1"

Side Outlet Ceiling Diffuser Box | 8" X 8" X 8" | Galvanized Steel Metal Box is Compatible with Duct 8" Material_Anodized Aluminum and smooth surface+ Product Details Size & Compatibility The size of the side round ceiling box is 8" X 8" 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 This sheet metal register duct ceiling outlet box is used for a 90 degree connection of round pipe to a square