... one of the Face masks carefully. Specification Material FFP3 Chemical Respirator with Valve style EarloopApplicationFor medical, surgical, pharmaceutical, laboratorial ... daysTerms of paymentL/C,T/TStorageStored in a cool, dry ,well-ventilated warehouseSamples Time1 3-5days-If you ... the solid particle dust, and prevent the oil liquid gas.6.Use for construction, mining, textile, grinding medicine, ...