... 5. Mainly used in medical, food hygiene, electronics, dust-free room, school, pharmaceutical industry, public health ad so ... on.6. Advantages: ventilation, dust, high bacteria filtration. Package:Packing: per customer's requirementsContainer ... loading: 500 cartons/20 GP, 1250 cartons/40 HQDelivery:Loading port: Qingdao, ...