The MULTI-PLEAT CL-1 20x25X4 air filter by Koch Filter Corp is engineered for high-efficiency filtration in HVAC systems. This filter measures 20"x25"x4" and features a pleated design that increases surface area for enhanced dust and allergen capture. Constructed from durable materials, it meets industry standards for air quality, making it suitable for both residential and commercial applications. Each carton contains 6 filters, providing a cost-effective solution for maintaining clean air. The MULTI-PLEAT CL-1 is easy to install and replace, ensuring optimal airflow and filtration.