Port A Cool evaporative coolers utilize a patented, unique housing design and high efficiency Kuulâ„¢ cooling media to produce effective and efficient cooling in any type of area. Protect your 48 inch Port A Cool evaporative cooler with the PAC-FRAME-48 frame and filter kit. Quick, easy to assemble, and constructed of heavy duty metal and PVC, the PAC-FRAME-48 is a complete filter system designed to keep airborne contaminants from clogging the Kuulâ„¢ pads, and catches most foreign particles before they reach these pads. This results in unrestricted airflow, prolonged filter life, and ultimately, enhanced performance.Please Note: The PAC-FRAME-48 is compatible with the following Port A Cool 48 inch models: PAC2K482S and PAC2K48EP. Port A Cool Evaporative Cooling Units are Manufactured by Port A Cool, LLC., Center, Texas U.S.A.