... cutting off wee dust,absorbing industrial waste gas,such as benzene,formaldehyde and other pernicious ... /box,10bags/carton,500pcs/cartontie on face mask with eyeglassAccord with EU EN ISO 13485/2003 ... cutting off wee dust,absorbing industrial waste gas,such as benzene,formaldehyde and other pernicious ... cutting off wee dust,absorbing industrial waste gas,such as benzene,formaldehyde and other pernicious ...