... , chemical, sterilizing, spray, agriculture, solution cleaning, painting, ink and dyeing, electronic, food processing, workshops, etc.*packing:20pcs/box,20boxes ... disposable mask,non-woven face mask,particulate resirator.**Quality control.A) Vic mask use polypropylene as the main ... as America,Europe,Japan and so on. 4-ply non-woven CE face mask respirator with vavle and activated carbon fabric