Dust mask A.EN132747:2003, EN143:2000 and CE0121 B.With valve or without valve C.Style:ear-loop D.Comfort,safe Dust ... and strong electrostatic filtering materials effectively filter the solid particle dust, and prevent the oil liquid gas.6.Use for ... grinding medicine, disintegration projects, cement, agriculture and animal husbandry, cutting dust, pollutes from heavy metal. FFP1 Dust Mask