20" X 25" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Access Door Actual Filter Size – 17

Actual Filter Size – 17 3/4"w x 33 3/4" x 1"

+ Product Details Size & Compatibility – The galvanized sheet metal oval stack head is compatible with Duct 8"

5 IN A PACK - 16 Inch Diameter Pipe – 10 Foot Length When Connected – 26 Gauge Thick & Made of Thick & Durable Galvanized Sheet Metal - Used For HVAC System Duct Work In Any Building or Home

12" Diameter Is The Size For The Duct Opening Measurement Only

75 Width X 11

20" X 25" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES Access Door Actual Filter Size – 17+ 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,