18x30x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 29.75) - 3 Pack Height_10in Design – With its dual-directional

Design – With its dual-directional design

+ Product Details Size - 26"w X 36"h is the size for the duct opening measurement only

Airflow Control – Adjustable airflow lever allows precise control over the direction and volume of air

With a 16-inch size

18x30x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 29.75) - 3 Pack Height_10in Design – With its dual-directional+ Product Details 18" x 30" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17. 75" x 29. 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