The Isingo Ad1000 Hepo-Activated Charcoal Filter is a high-quality air filter designed to improve indoor air quality. This single filter measures 16x13 inches and utilizes activated carbon filtration technology to effectively remove impurities and allergens from the air. The brand, Filter, ensures a reliable and trusted product for maintaining clean and fresh air in your living space. With its compact size and efficient filtration capabilities, this air filter is a great addition to any home looking to improve air quality.