HEALTHY AIR FAN FILTERS S:BOX FAN S/2
Filter the air you breathe every time you turn on the fan. Powerful microfiber filter slips on instantly over fan cage to put a halt to the spread of flying dust& irritating allergens. You'll breathe easier & dust less as it creates a healthier environment for you, your family & pets. Fits 20" x 20" box fans or standard 12" - 16" round fans.