Do it Efficiency Rated Dust & Lint Furnace Filter, 10 x 24 x 1 in. is a MERV 6 efficiency rated HVAC air filter designed to be five times more effective than standard fiberglass filters. It provides reliable protection for your furnace and central air equipment by capturing household dust and lint. This filter is effective for up to 60 days, ensuring cleaner air and better system performance with its gray label design. Model Number: 447868