PureIllusion Crystalline Prefilter for IQAir HealthPro Series Air Purifiers

‌NASA Talent: Product development is led by a former NASA engineer; Brainpower with a history in space, making life better here at home Ultimate Pre Filtration: Includes Genuine Crystalline Ultra Premium Stage 1 Pre-Filter; easy-to-follow illustrated installation instructions; thank you card and complimentary product support No Compromises: Crystalline Trade Secret Pre Filtration Technology provides >= 90% .3 micron capture, as opposed to >= 55%; increased performance without restricting purifier airflow (CFM) Ultimate Compatibility: Manufactured to strict tolerances; Crystalline Stages F1, F2, and F3 are compatible with IQAir PreMax Module, IQAir V5 Cell Module, and IQ Air Hyper Hepa Module respectively