Combination Cartridge/Filter, Black, Magenta, 1 PR, NIOSHMfr #: D80921 DESIGNED FOR USE WITH 3M Secure Click Half Face Piece Reusable Respirator HF 800 Series which offers better breathability, unique filter cartridge connection, and push button seal check NIOSH APPROVED P100 particulate filter for respiratory protection against certain organic vapors and certain oil and non oil based particulates QUICK, SIMPLE CONNECTION: Snap connection helps provide confidence that filters cartridges are installed