Respiratory protection filter, brown, EN 14387, type AX, 1 unit(s)Respiratory protection filter, brown, EN 14387, type AX Acc. to EN 14387 (gas and combined filters) and EN 143 (particulate filters). With EN 148 1 standard thread. Filter casing made of aluminium. Can be combined with respiratory half masks and full face masks with standard thread connection. Max. storage life of unopened gas and combined filters is six years after production. AX and NO filters are only intended for single use. Technical Information