12" X 12" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 13" Width X 13" Height] 18in diameter + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 32"w X 12"h is the size for the duct opening measurement only

is the same as a 1/4" Plumbing fitting

actual front end outer dimensions are approximately 18 5/8" width X 10 5/8" height

The vent also has a bug screen to eliminate pest intrusion

ensuring reliable performance over time

12" X 12" Aluminum Access Panel Gypsum Board Sheet Rock Door For Wall Ceiling Application (PUSH LOCK DOOR) With Frame [Outer Dimensions: 13" Width X 13" Height] 18in diameter + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 32"w X 12"h is the size for the duct opening measurement only is the same as a 1 4" Plumbing fitting