12 x 12 Merv 2 HVAC Pleated Filter, 12-Pack return grille + Product Details Size –

+ Product Details Size – 20" x 24" or 24" x 20" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 21" width X 21" height -

Easy Installation – Quick and painless installation – Can be installed after line set is in place

It is compatible with duct 7"

12 x 12 Merv 2 HVAC Pleated Filter, 12-Pack return grille + 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