Executive Standard: YY0469-2011 "Medical Surgical Mask" This product is sterilized by ethylene oxide, and the sterilization period is two years. The filtration efficiency of this product is greater than 95%, and the filtration efficiency of non-oily particles is greater than 30%. 50 pcs / box, 40 boxes / carton, 1 carton = 2000 pcs This product has an international certification test report and certificate. If you need it, please contact the sales staff to obtain it.
