Filter Element Element Material Polyester Compatible Manufacturer Part Number 5Z660 5Z661 F-15-050 F-15-075 F-15-100 FS-15-050 FS-15-075 FS-15-100 Compatible Grainger Part Number 5Z660 5Z661 Overall Height 2.31 in Inside Diameter 3 in Outside Diameter 4 3/8 in Filter Rating 5 micron Filtration Efficiency 99 Percent Maximum Flow Rate 35 cfm Features Moisture Resistant Pleated Media for High Dirt Holding Capacity Housing Material Steel