The NIB Minuteman 100 CFM Class 2 Replacement HEPA Filter COPOLM 110004 is a high-quality air filter designed for use in HVAC systems such as air conditioners and furnaces. This HEPA filter features activated carbon filtration technology, making it effective at capturing allergens, fungal spores, dust, dust mites, and bacteria. With a filter life of 12 months, this black filter is a reliable choice for maintaining clean and healthy air in your environment. Made in the United States by Minuteman, this filter is a single unit that comes in a pack of 1.