Replacement activated charcoal filter cartridge for the xTool SafetyPro AP2 V1.0 air purifier. Designed to absorb harmful airborne substances, chemical fumes, and unpleasant odors generated during laser cutting and engraving. It functions as activated carbon bed within the 6-layer filtration system of the AP2 (SuperCyclone, pre-filter, medium efficiency, activated charcoal, ultra-tight carbon mesh, HE filter).