The 201 Air Filter Replacement is compatible with Aprilaire 2200, 2250 Space Gard 2200, and A models. This 3 pack of filters is made of polyester material with a minimum efficiency reporting value of 10.0. With dimensions of 25.0x6.5x6.0 inches and a weight of 5.45 pounds, these new product grade filters are designed to provide clean and fresh air for your home. The Aprilaire 201 Filter Replacement is a reliable and efficient choice for maintaining indoor air quality.