Top Outlet Ceiling Diffuser Box | 6" X 6" X 4" | Galvanized Steel Metal Box Is Compatible With Duct 4" 5in diameter + Product Details Size –

+ Product Details Size – 20"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are 19

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actual front end outer dimensions are approximately 12 5/8" width X 10 5/8" height

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Top Outlet Ceiling Diffuser Box | 6" X 6" X 4" | Galvanized Steel Metal Box Is Compatible With Duct 4" 5in diameter + Product Details Size –+ 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 The C box duct with drywall flange, round connects to vent register diffuser, airflow conditioning ceiling