Filter Element, Element Material Paper, Compatible Manufacturer Part Number C31/2, Overall Height 1.5 in, Inside Diameter 3/8 in, Outside Diameter 1 1/8 in, Filter Rating 2 micron, Filtration Efficiency 99 Percent, Maximum Flow Rate 5 cfm, Features Pleated Media for High Dirt Holding Capacity, Housing Material Galvanized Metal, Maximum Operating Temperature 220 Degrees F