18"w X 12"h Aluminum Privacy Door HVAC Air Grille - "V" Shaped Louvers Ensure 100% View Block - Supply or Return Compatible With Duct 12in + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 26"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 19 3/4"w x 25 3/4" x 1"

Actual Filter Size – 24 3/4"w x 5 3/4" x 1"

+ Product Details Size – 10"w X 18"h is the size for the duct opening measurement only

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

18"w X 12"h Aluminum Privacy Door HVAC Air Grille "V" Shaped Louvers Ensure 100% View Block Supply or Return Compatible With Duct 12in + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 26"w X 18"h is the size for the duct opening measurement only Actual Filter Size – 19 3 4"w x 25 3 4" x 1"