The Nordic Pure MERV 8 4-inch Pleated Furnace Filters are designed to enhance your home's air quality by efficiently capturing most airborne particles. With dimensions of 20x20x4 inches, these electrostatically charged filters come in a convenient 6-pack, making them a perfect choice for maintaining a healthier indoor environment. Suitable for residential HVAC systems, these filters are an effective solution to reduce allergens and improve air flow.