End Register Duct Boots - 14" X 4" X 8" Round End Center is Compatible with Duct 8" Grey + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 12"w X 6"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 6" OR 6" x 28" duct opening (measured at the opening)

and sound level range of NC 25 to 35

+ Product Details Size – 24"w X 28"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 14"h is the size for the duct opening measurement only

End Register Duct Boots 14" X 4" X 8" Round End Center is Compatible with Duct 8" Grey + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 12"w X 6"h is the size for the duct opening measurement only + Product Details Perfect Fit & Easy Sizing Designed for a 28" x 6" OR 6" x 28" duct opening (measured at the opening)