CKH-03023 anti organic vapor gas fitler equipped with gas mask,gas respirator,chemial mask, this model gas filter used in acid CKH- ... space(cm2) <170Below horizon (degree)>35now for gas respirators, there are signal cartridge and dual cartridge . in material ,there are pvc ,soft ... doc comCKH-03023 : No.3 gas filter , anti-organic vapor;CKH-03024, No.4 gas filter, anti-ammonia, anti-hydrogensulfide; ...