CE certificate half face gas mask against C6H6,CL2 SO2 1.Purpose and CharacteristicMF25 half face piece gas mask is apply to the workers, who work in ... so on. The product’s components are the body of half face mask, the cartridge, exhale valve, rubber headbands. The headbands can be ... solvent.5.3 Storage life: more than 5 years. MF25 half face piece gas mask