The 3M Cartridge P3 R (HF) is a high-efficiency particulate filter designed to protect against solid and liquid hazardous particles, including fine dusts, mists, fumes, and aerosols. Specifically developed for environments where airborne particulates pose a risk, this filter delivers P3-level protection — achieving a minimum filtration efficiency of ≥99.95%. Compatible with 3M reusable half and full face respirators, the P3 R (HF) cartridge features the trusted 3M bayonet connection system, allowing for quick and secure attachment.