12 x 12 Merv 2 HVAC Pleated Filter, 12-Pack 3" Round Duct Pipe + Product Details Size –

+ Product Details Size – 12" x 20" or 20" x 12" is the size for the duct opening measurement only

+Why Hvac Premium HVAC Premium has been providing superior quality service for many years

+ Product Details Size – Stick-on collar is 5" and it is compatible with duct 5"

+ Product Details Size - 24"w X 10"h is the size for the duct opening measurement only

12 x 12 Merv 2 HVAC Pleated Filter, 12-Pack 3" Round Duct Pipe + Product Details Size –+ Product Details Size 12"w X 12"h pleated MERV 2 filter for HVAC return filter grille 12 Pack. Actual dimensions: 11. 75" X 11. 75" High Quality A uniquie combination of cotton & synthetic fibers gives you the most filtration and the least air resistance equals great air & easy airflow for your system Design The W shaped pleats increase the surface area, effectively capturing dirt and particles such as pollen, dust mites, standing dust, spray paint