18" x 12" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 17.75 X 11.75] 3-Pack w22h22 + Product Details Size –

+ Product Details Size – 14"w X 4"h is the size for the duct opening measurement only

+ Product Details Size – 25"w X 6"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 21 3/4" x 1"

precise cuts without any bending or breaking

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

18" x 12" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 17.75 X 11.75] 3-Pack w22h22 + Product Details Size –+ Product Details Size 18"w X 12"h pleated MERV 8 filter for HVAC return filter grille 3 Pack. Actual dimensions: 17. 75" X 11. 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