18x24x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 23.75) - 3 Pack Adjustable Return + Product Details Size &

+ Product Details Size & Compatibility – The size of the side round ceiling box is 8" X 8" X 5" and it is compatible with duct 5"

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 & Compatibility – The size of sheet metal pipe is 10" round x 10' long

18x24x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 23.75) - 3 Pack Adjustable Return + Product Details Size &+ 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