The T-series replacement filter A1B1E1K1 is used against toxic gases relevant to the A B E K classification according to the EN 141 standard, and for the particulate filter, P3 according to EN 143 (highly efficient filter 99.95%).
This filter can only be used with a half mask Valuair, Premier or MX / PF or a full face mask Optifit Twin equipped with a T-system.