Non-wove face mask 1.size:175*95mm 2.pack:50pcs/bag,60inner box / ... ,000PCS More in Detail: Good air permeability, high rate of dust-proof, High effective prevent oil-particles, filter bacteriaSwine flu, Bird ... : BFE:99%Apply to: Hospital, Health, beauty, food hygiene, electronics, dust-free clean rooms and outdoors.Customer's requirements are available face mask