Stop running to the store every few months for a new air filter! This case of 12 Flanders pleated filters means you're set for a whole year (if you change every 3 months). The size is the super common 16x25x1 inch, perfect for many furnaces and AC systems. They're MERV 8 rated, which means they catch a good amount of dust, pollen, and lint without restricting airflow too much. Made in the USA with paper media, they're basic but reliable. Changing your filter regularly keeps your system running efficiently, saves you money on energy bills, and improves your indoor air quality. This bulk pack is the most cost-effective way to stay on top of it. Just stash the box in a closet and grab a new one when it's time. Simple maintenance made easy.