■Specifications /Classification: DS2 /10 sheet / pack /Particle collection efficiency: Internal standard value: 95.0% or more/Average value: 98.4% /Intake resistance: Internal standard value: 50Pa or less/Average value: 35Pa /Exhaust resistance: Internal standard Value: 50 Pa or less/Average value: 35 Pa /Weight: Company standard value: 12.1 g or less/Average value: 9.1 g /Usage limit: 13 hours /Dimensions: 125 x 40 x 114 mm /Weight: 0.0091 kg /Package dimensions: 170 ×50×150mm Package weight: 30g Masker N95 Koken, Koken Hi-luck 350, Koken N95 Mask 350, Koken 350