14 x 8 Merv 2 HVAC Pleated Filter, 12-Pack 12in diameter 5mm of thickness to ensure

5mm of thickness to ensure a proper seal while being light and

actual front end outer dimensions are approximately 16 5/8" width X 22 5/8" height

+ Product Details Size - 12"w X 18"h is the size for the duct opening measurement only

High Quality – Rigid aluminum construction with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Size - 20"w X 12"h X 2"d (for duct opening measurement only)

14 x 8 Merv 2 HVAC Pleated Filter, 12-Pack 12in diameter 5mm of thickness to ensureThe W shaped pleats enlarge the surface area for capturing dirt and particles for cleaner air Get 3 MERV 2 AC filters per pack while only paying for 2 Dimensions are interchangeable for rectangular filters, but not square ones Let air circulate and cycle through your HVAC without obstructions