20" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Copper Coil We also made sure that

We also made sure that each filter in every pack lasts you a long time

actual front end outer dimensions are approximately 12 5/8" width X 10 5/8" height

+ How To Measure A Round Vent Overall Size:

Design – This balancing damper is designed to cut off the central air conditioning (heating or cooling) to an unused room

ensuring a perfect fit

20" X 16" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Copper Coil We also made sure that+ Product Details Size 20"w X 16"h is the size for the duct opening measurement only, [Outer Dimensions: 22. 5"w X 18. 5"h] Actual Filter Size 19 3 4"w x 15 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,