20x16x1 Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 19.75 X 15.75] 3-Pack Grille simply pop the diffuser into

simply pop the diffuser into the wall duct hole and let the side springs hold it securely in place

+ Product Details Size – 18"w X 16"h is the size for the duct opening measurement only

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

This product features a 120-degree plane bend

Actual Front End Outer Dimensions Are 18" Width X 5" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

20x16x1 Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 19.75 X 15.75] 3-Pack Grille simply pop the diffuser into+ Product Details Size 20"w X 16"h pleated MERV 8 filter for HVAC return filter grille 3 Pack. Actual dimensions: 19. 75" X 15. 75" High Quality A uniquie combination of cotton & synthetic fibers gives you the most filtration and the least air resistance equals great air & easy airflow for your system Design The "W" shaped pleats give you more filter surface thereby capturing more dust. Our metal and paper diagonal support bars ensure the filter can