12x24x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 23.75) - 3 Pack End Register Duct Boots + Product Details Size -

+ Product Details Size - 25"w X 14"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 8" or 8" x 14" duct opening (measured at the opening)

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10"w X 6"h Is The Size For The Duct Opening Measurement Only

12x24x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 23.75) - 3 Pack End Register Duct Boots + Product Details Size -+ Product Details 12" x 24" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 11. 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