... Dust mask 2)CE EN149:2001 3)FFP1 Grade 4)package: 20pcs/color box or headcard or double blister 1) Disposable Dust mask2)CE ... electrostatic filtering material, protect you from solid particle dust, oil liquild gas.E)Use for construction, ... , disintegration projects, agriculture and animal husbandry, cutting dust, pollutes from heavy matal.packing type:1)standard: ... double blister with a header. DUST MASK