Disposable 3-layer Protective Mask Quick Details Place of Origin: Zhejiang, China Brand Name: BioTech Function: Anti-dust Anti-microbial Function index: Bacterial Filtration Efficiency â?¥95% Material: Melt blown nonwovens & Polypropylene spun bond nonwovens Color: White Application: Pollution District Size: 19cm x15cm Production standardï¼?GB/T 32610-2016 Term of validityï¼?2 years Date of manufactureï¼?See the inspection certificate in the packing box MOQï¼?1,000pcs Packingï¼?50pcs per box Supply capabilityï¼?100,000pcs per week