20" X 40" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Width_20in + Product Details Size –

+ Product Details Size – 24" x 32" or 32" x 24" is the size for the duct opening measurement only

HIGH QUALITY & DURABLE – Made of UV AND Fire Resistant ABS Plastic – UL-94V-0 Equivalent

Actual Filter Size – 21 3/4"w x 11 3/4" x 1"

diagonally feed it through the square hole

20" X 40" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Width_20in + Product Details Size –+ Product Details Size 20"w X 40"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 42. 5"h] Actual Filter Size 19 3 4"w x 39 3 4" x 1" High Quality High quality rust free, strong aluminum construction with smooth finished edges for easy and safe use; Filter grille features a user friendly plastic latch that requires no screwdriver for opening. Installation Location Sidewall and ceiling. Design Heavier gauge than needed,