3M Secure Click D8094 A1B1E1K1P3 R Filter with Dual Flow3M Secure Click Gas, Vapour and Particulate Filters D8000 Series can offer protection against a range of respiratory hazards depending upon the model selected. Suitable for use with 3M Secure Click Reusable Respirators, the cartridges can also be used in combination with 3M Secure Click Particulate Filters D7900 Series, with a 3M D701 Filter Retainer. New dual flow cartridges and filters allow for easier breathing Quick, simple cartridge connection.