The Aluminum Electrostatic Air Filter by Trophy Air is a MERV 1 rated filter designed for furnaces. Made in the United States, this washable filter features a silver metal filtration technology that captures airborne particles. With a filter life of 120 months and a flat panel design, it is reusable and easy to clean. The aluminum filter frame and metal filter media ensure durability and efficient filtration, making it a reliable choice for maintaining indoor air quality.