3M D3138 Secure Click P3 R Filter3M 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 x WEL. 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 x Workplace Exposure Limit Quick, simple connection.