Side Ceiling Box | Side Out Ceiling Register Box | 12" X 12" X 12" | Galvanized Steel Metal Box is Compatible with Duct 12" R-6.0 insulation + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 22"w X 20"h X 2"d (for duct opening measurement only)

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+ Product Details Size - 36"w X 16"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 28" or 28" x 12" duct opening (measured at the opening)

+ Product Details Size & Compatibility – The 8" galvanized steel round side take-off is compatible with duct 8"

Side Ceiling Box Side Out Ceiling Register Box 12" X 12" X 12" Galvanized Steel Metal Box is Compatible with Duct 12" R 6.0 insulation + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 22"w X 20"h X 2"d (for duct opening measurement only) const isOpen = item