10"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 33.75"h] Insulated Line + Product Details Perfect Fit CL 34 12B 35 Product Details Size 6 Extruded Aluminum Ceiling

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 34" OR 34" x 24" duct opening (measured at the opening)

+ Product Details Size - 18"w X 20"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 36"h is the size for the duct opening measurement only

Refrigerant - 1/2" White Insulation - 50' Long

+ Product Details Size – 20"w X 32"h is the size for the duct opening measurement only

10"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 11.75"w x 33.75"h] Insulated Line + Product Details Perfect Fit CL 34 12B 35 Product Details Size 6 Extruded Aluminum Ceiling + Product Details Perfect Fit & Easy Sizing Designed for a 24" x 34" OR 34" x 24" duct opening (measured at the opening) + Product Details Size 18"w X 20"h is the size for the duct opening measurement only