Particulate Pre-Filters for Mini-Safe 12 pack

Particulate Pre-Filter (ACFPRE) is an electrostatically charged fiber filter that removes sub-micron particulates. This filter has an efficiency rating of 99.997% @ 0.3 microns. Used to protect the absorption filters from contamination. Each absorption filter is fitted with a pre-filter at time of purchase. Sold in packs of 12.