... of high efficient melt blown web which resists dust and oil-free particles.*Adjustable nose piece provides a custom ... mining, chemical, sterilizing, spray, agriculture, solution cleaning, painting, ink and dyeing, electronic, food processing, workshops, etc.*packing:20pcs/box,20boxes ... exported to many countries,such as America,Europe,Japan and so on. 4-ply non-woven CE face mask respirator with ...