18x12x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 11.75) - 3 Pack 8in diameter + Product Details Size -

+ Product Details Size - 20"w X 12"h X 2"d (for duct opening measurement only)

Applications – The snap collar duct board fitting is used as a main duct or plenum

this grille offers durability and resistance to rust and corrosion

+ Product Details Size – 24" x 24" with 12" collar T-Bar drop ceiling perforated return grill - metal back casing

18x12x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 11.75) - 3 Pack 8in diameter + Product Details Size -+ Product Details 18" x 12" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17. 75" x 11. 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