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

+ Product Details Size - 28"w X 34"h is the size for the duct opening measurement only

+ Product Details Size – 8" x 20" or 20" x 8" is the size for the duct opening measurement only

+ Product Details Size - 30"w X 18"h is the size for the duct opening measurement only

3/8" - 4223 PSI

actual front end outer dimensions are approximately 12 5/8" width X 8 5/8" height

24"w X 12"h Aluminum Privacy Door HVAC Air Grille "V" Shaped Louvers Ensure 100% View Block Supply or Return 18" Diameter + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 28"w X 34"h is the size for the duct opening measurement only + Product Details Size – 8" x 20" or 20" x 8" is the size for the duct opening measurement only