12" x 12" [Duct Opening] Flat Plaque Aluminum Ceiling Supply Diffuser Duct Cover with Lever-Operated Damper for Air Flow Control [Outer Dimensions: 15" x 15"] R-6.0 insulation + Product Details Size & 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size & Compatibility – The 12" galvanized steel metal stick on take-off is compatible with duct 12"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 26" OR 26" x 32" duct opening (measured at the opening)

+ Product Details Size - 18"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 20"w X 32"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 32" OR 32" X 16" duct opening (measured at the opening)

12" x 12" [Duct Opening] Flat Plaque Aluminum Ceiling Supply Diffuser Duct Cover with Lever Operated Damper for Air Flow Control [Outer Dimensions: 15" x 15"] R 6.0 insulation + Product Details Size & 4 X 12 Is CRFG2028 Width_14in + Product Details Size & Compatibility – The 12" galvanized steel metal stick on take off is compatible with duct 12" + Product Details Perfect Fit & Easy Sizing Designed for a 32" x 26" OR 26" x 32" duct opening (measured at the opening)