... Dustproof efficiency:99% 3,OEM are welcome 4,clean and health Detailed Product Description1,Filtration efficiency N95 2,Dustproof ... chemicals or stimulant.4. Adjustable contoured aluminum nosepiece and a soft inner foam nose cushion help to ensure ... Dyeing, Garage, Mining, Factories of electronic aid and food, Disinfecting, Insalubrious workshops, etc. Clean and healty high quality dust face mask