12" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 10" Diameter + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 8" or 8" x 6" duct opening (measured at the opening)

14"w X 6"h Is The Size For The Duct Opening Measurement Only

This 20" X 6" end cap is constructed with 26-gauge galvanized steel

+ Product Details Size – 16" x 36" or 36" x 16" is the size for the duct opening measurement only

+ Product Details Size & Compatibilty - The 10" to 4" round metal pipe reducer & increaser 30 gauge is compatible with duct 10" to 4"

12" X 24" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES 10" Diameter + Product Details Perfect Fit+ Product Details Size 12"w X 24"h is the size for the duct opening measurement only, [Outer Dimensions: 14. 5"w X 26. 5"h] Actual Filter Size 11 3 4"w x 23 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,