3M™ Secure Click™ Cartridge A1 D8051 is CE approved against certain organic vapours with a boiling point above 65 ?C. Use our cartridge with 3M™ Secure Click™ Reusable Respirators 800 Series. New dual flow cartridges and filters allow for easier breathing. New dual flow cartridges and filters allow for easier breathing, Protects against certain organic vapours with a boiling point above 65 ?C, Quick, simple connection. Simply align the connections and push until you hear a click, Use with 3M™ Secure Click™ Reusable Respirators 800 Series, Can also be used in combination with 3M™ Secure-Click™ Particulate Filters D7900 Series, with a 3M™ D701 Filter Retainer, Swept-back design allows an enhanced field of view and compatibility with welding and grinding shields. CE approved 1 BOX = 8 FILTERS (NOT PAIRS)