End Register Duct Boots - 12" X 2.25" X 5" Round End Center is Compatible with Duct 5" ceiling actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 14 5/8" width X 14 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 12" OR 12" X 16" duct opening (measured at the opening)

The 45-degree louvers reduce system stress while optimizing performance

no competitor comes close to us - we use an extra thick board that prevents humidity

+ Product Details Size – 12" X 4" is the size for the duct opening (floor/vent hole) measurement only

End Register Duct Boots 12" X 2.25" X 5" Round End Center is Compatible with Duct 5" ceiling actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 14 5 8" width X 14 5 8" height + Product Details Perfect Fit & Easy Sizing Designed for a 16" x 12" OR 12" X 16" duct opening (measured at the opening)