The N95 mask is one of nine types of particulate respirators certified by NIOSH, the National Institute for OccupatNon Woven Bag ional Safety and HeLab Utensil and Disposable alth.N95 is not a specific product name, as long as it meets the N95 standard and passes the NIOSH review, it can be called N95 mask, which can achieve filtration efficiency of more than 95% on particles with an aDrilling Tools erodynPipe & Tube System amic diameter of 0.24±0.6 m (physical diameter of 0.075 m±0.020 m). Grinder