12x20x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 19.75) - 3 Pack w14h14 featuring a 3/8 inch space

featuring a 3/8 inch space between louvers

Effortless Integration: Crafted for easy connection to supply grilles of drop ceiling T-Bar vent covers

The total outer size of this grille is the listed size plus 3"

the actual front end outer dimensions are 8" in diameter

12x20x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 19.75) - 3 Pack w14h14 featuring a 3/8 inch space+ Product Details 12" x 20" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 11. 75" x 19. 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