5 Micron level.Performance:Built to the highest quality standards : Contaminent Reductions down to 0.1001Bunn 30331.Compatible with:3M 700200025753M 700200151893M 700200414583M 700200414663M AP517013M AP51706Aqua Pure 55600-01Aqua Pure 5560009Aqua Pure 55600-09Aqua Pure AP517Aqua Pure AP51701Aqua Pure AP51706AquaPure AP517AquaPure AP51701AquaPure AP51706AquaPure AP-DW85BevGuard BGC2300SBevGuard BGC-2300SBunn 30331.