The Windmill AC Activated Carbon Filters are designed for a 6kbtu AC unit and come in a pack of 4 pads. Utilizing activated carbon filtration technology, these filters are specifically made for air conditioners to improve indoor air quality. The filter media is carbon, known for its ability to effectively capture and remove airborne particles, odors, and pollutants. Ideal for maintaining a clean and fresh environment, these Windmill filters provide efficient filtration for your AC unit.