1)Dust mask 2)Without valve 3)EN149:2001 FFP1 approval 1)Dust mask2)Without valve3)EN149:2001 FFP1 approval4)Package: ... strong electrostatic filtering material, protect you from solid particle dust, oil liquild gas.E)Use for construction, mining, ... gringing machine, disintegration projects, agriculture and animal husbandry, cutting dust, pollutes from heavy matal.packing type:1)standard: 20pcs per ...