36" X 10" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Air Deflector + Product Details Size &

+ Product Details Size & Compatibility – The size of sheet metal pipe is 3" round x 48" long

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 18" OR 18" X 16" duct opening (measured at the opening)

Applications – The snap collar duct board fitting is used as a main duct or plenum

+ Product Details Size - 14"w X 20"h is the size for the duct opening measurement only

36" X 10" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Air Deflector + Product Details Size &+ Product Details Size 36"w X 10"h is the size for the duct opening measurement only, [Outer Dimensions: 38. 5"w X 12. 5"h] Actual Filter Size 35 3 4"w x 9 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,