HEPA Cartridge Filter, Element Material Fiberglass, Compatible Manufacturer Part Number F-234P-300, F-234P-400, F-234P-400F, FS-234P-300, FS-234P-400, FS-234P-400F, Overall Height 9.38 in, Inside Diameter 4 3/4 in, Outside Diameter 7 13/16 in, Compatible Product Type Hospital Vacuum Units, Medical Gas Distribution Systems, Vacuum Pumps and Systems, Filter Rating 0.3 micron, Filtration Efficiency 99.97 Percent, Maximum Flow Rate 207 scfm, Housing Material Carbon Steel