3M Secure Click Particulate Filter P3 R D3138 is CE approved for environments containing certain particles. Our Filter can also be used for nuisance level organic vapour relief and for ozone protection up to 10 xWEL. New Dual Flow cartridges and Filters allow for easier breathing, Protects against particulates with nuisance level organic vapour/acid gas relief, Protection against ozone up to 10 xWorkplace Exposure Limit, Quick, simple connection. Simply align the connections and push until you hear a click, Use with 3M Secure Click Reusable Respirators 800 Series, Swept-back design allows an enhanced field of view and comfort, Use for protection in hazardous environments, CE approved 1 Box 20 Filters (NOT PAIRS).