18"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 27.75"h] 18" Diameter + Product Details Size – CRFG2028 Width_14in 4 X 12 Is

+ Product Details Size – 24" x 24" with 14" collar T-Bar drop ceiling perforated return grill - metal back casing

It has an outer surface made of high-quality aluminum foil and an inner surface made of metalized PET with inside high-tensile spring steel wire

actual front end outer dimensions are approximately 27 5/8" width X 12 5/8" height

closest('dt')

See our separate listing of T-Bar Supply Grilles

18"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 19.75"w x 27.75"h] 18" Diameter + Product Details Size – CRFG2028 Width_14in 4 X 12 Is + Product Details Size – 24" x 24" with 14" collar T Bar drop ceiling perforated return grill metal back casing It has an outer surface made of high quality aluminum foil and an inner surface made of metalized PET with inside high tensile spring steel wire