... applications: Hardware, plating, mining, chemical, sterilizing, spray, agriculture, solution cleaning, painting, ink and dyeing, electronic, food processing, workshops, etc.*packing:20pcs ... Various mask can be supply,including face mask,Anti-Flu mask,disposable mask,non-woven face mask,particulate resirator.**Quality control.A ... Europe,Japan and so on. 3-ply non-woven CE face mask respirator with vavle