... can prevent from cutting off wee dust,absorbing industrial waste gas,such as benzene,formaldehyde and other pernicious gases.Used ... *175MMPackage:50pcs/box,10bags/carton,500pcs/cartontie on face mask with eyeglassAccord with EU EN ISO 13485/2003,has got CE certificatePP+ ... can prevent from cutting off wee dust,absorbing industrial waste gas,such as benzene,formaldehyde and other pernicious gases.Used ...