20x25x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 19.75 x 24.75) - 3 Pack 12in diameter while a waterproof base ensures

while a waterproof base ensures protection against rust and damage

this boot smoothly connects round pipes or insulated flex ducts to wall stacks

+ Product Details Size - 30"w X 14"h X 2"d (for duct opening measurement only)

Actual Filter Size – 17 3/4"w x 19 3/4" x 1"

20x25x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 19.75 x 24.75) - 3 Pack 12in diameter while a waterproof base ensures+ Product Details 20" x 25" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 19. 75" x 24. 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