Side Outlet Ceiling Diffuser Box | 6" X 6" X 4" | Galvanized Steel Metal Box is Compatible with Duct 4" Supply Grille accordion-content { display: none

accordion-content { display: none

+ Product Details Size - 36"w X 34"h X 2"d (for duct opening measurement only)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 18" or 18" x 8" duct opening (measured at the opening)

+ Product Details Size - 20"w X 20"h is the size for the duct opening measurement only

Actual Filter Size – 23 3/4"w x 19 3/4" x 1"

Side Outlet Ceiling Diffuser Box | 6" X 6" X 4" | Galvanized Steel Metal Box is Compatible with Duct 4" Supply Grille accordion-content { display: none+ Product Details Size & Compatibility The size of the side round ceiling box is 6" X 6" X 4" and it is compatible with duct 4" 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