30"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 29.75"h] return filter Its locking eight-tumbler mechanism and Compatible with Duct 4" Product Details Size 32 LO246

Its locking eight-tumbler mechanism and supplied key safeguard your thermostat from tampering

With its reliable construction and sleek design

14" Diameter Is The Size For The Duct Opening Measurement Only

+ Product Details Size – 24"w X 22"h is the size for the duct opening measurement only

+ How To Measure A Grille Overall Size:

30"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 31.75"w x 29.75"h] return filter Its locking eight tumbler mechanism and Compatible with Duct 4" Product Details Size 32 LO246 Its locking eight tumbler mechanism and supplied key safeguard your thermostat from tampering With its reliable construction and sleek design