18x24x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 23.75) - 3 Pack Adjustable Return Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 31 3/4" x 1"

+ Product Details Size - 12"w X 12"h Is The Size For The Duct Opening Measurement Only

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

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Actual Filter Size – 33 3/4"w x 7 3/4" x 1"

18x24x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 23.75) - 3 Pack Adjustable Return Actual Filter Size – 25+ Product Details 18" x 24" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17. 75" x 23. 75") A unique combination of cotton & synthetic fibers gives you the most filtration and the least air resistance equals great air & easy airflow for your system. The non pleated design provides low airflow resistance while still effectively capturing dirt and particles such as standing dust, spray paint