6"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 11.75"h] Compatible With Duct 8in Secure Locking Mechanism – Features CRFG2028 Width_14in 4 X 12 Is

Secure Locking Mechanism – Features a permanently attached eight-tumbler lock with a supplied key for added security

+ Product Details Size - 36"w X 12"h is the size for the duct opening measurement only

this diffuser is the perfect blend of function and style for your home

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

actual front end outer dimensions are approximately 20 5/8" width X 16 5/8" height

6"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 7.75"w x 11.75"h] Compatible With Duct 8in Secure Locking Mechanism – Features CRFG2028 Width_14in 4 X 12 Is Secure Locking Mechanism – Features a permanently attached eight tumbler lock with a supplied key for added security + Product Details Size 36"w X 12"h is the size for the duct opening measurement only