The MICROMAX NHM 60/65 20X20X2 filter from Koch Filter Corp is a high-efficiency air filter designed for optimal performance in HVAC systems. Measuring 20 inches by 20 inches with a thickness of 2 inches, this filter is perfect for capturing airborne particles and improving indoor air quality. Each carton contains 12 filters, making it a cost-effective solution for regular replacements. The MICROMAX series is known for its durable construction and compliance with industry standards, ensuring reliable filtration for both residential and commercial applications.