22"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 27.75"h] Material_Aluminum With a 6" diameter for

With a 6" diameter for the duct opening measurement

actual front end outer dimensions are approximately 23 5/8" width X 7 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 20" OR 20" x 30" duct opening (measured at the opening)

+ Product Details Size – 24" x 24" with 8" collar T-Bar drop ceiling perforated return grill - metal back casing

3 * insulation density is 30kgs/cbm = 0

22"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 27.75"h] Material_Aluminum With a 6" diameter for+ Product Details Size 22"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 23. 75" Width X 27. 75" Height Weather and Pest Proof These louvers are especially designed to prevent water from entering your home, and with a built in back 1 2" mesh they also protect you from annoying rodents like mice, rats, birds, and squirrels High Quality Aluminum The premium durable aluminum will never rust and it will never