20" X 25" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Compatible with Duct 4" + Product Details Size –

+ Product Details Size – 36"w X 28"h is the size for the duct opening measurement only

Applications – This circular volume control damper plate is used to stops or regulates the flow of air inside a duct

High Quality ABS Plastic - Will Last Forever & NEVER RUST

actual front end outer dimensions are approximately 27 5/8" width X 34 5/8" height -

20" X 25" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Compatible with Duct 4" + Product Details Size –+ Product Details Size 20"w X 25"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 27. 5"h] Actual Filter Size 19 3 4"w x 24 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,