Airflow Systems 7FJ9-9003, 7FJ99003 99.99% ISO H13 HEPA filter replacement with galvanized steel frame. Guaranteed fit and performance. Replacement Filter for Airflow Systems 7FJ9-9003, 7FJ99003 99.99% HEPA Filter is ISO H13 99.95% MPPS Galvanized Steel Frame 18 x 24 x 4 Inches Nominal Size Individually Tested and Certified Fits models Mini-Pac, DT800, DT-800, FB800, FB-800 100% Guaranteed Fit and Performance Filtra-Systems Micro-Cell HEPA filters filters are designed to meet critical filtration requirements in the most sensitive applications. Micro-Cell HEPA filters are constructed using ultrafine wet-laid microglass filter media and corrugated aluminum pleat separators. Micro-Cell HEPA filters are recommended for use in medical facilities, pharmaceutical mfg., food processing, microelectronics mfg., and nuclear or biological applications. *NOTE: Brand names are used for identification purposes only, and are the intellectual property of the OEM. Filters are OEM Replacements manufactured by Filtra-Systems and are not OEM Brand products unless specifically stated as such. Filtra Supply is not related to the OEM.