Color:Blue Usage:Public Health Institution Disinfecting Type:Ultraviolet Light Type:medical mask Applicable People:Adult Standard:GB2626-2006 Stock:yes Shelf Life:2 years Quality Certification:ce Safety standard:GB2626-2006 Instrument classification:Class II Material:Melt-blown Fabric Place of Origin:CN;HEN Size:17.5cm*9.5cm Filter Rating:>95% Brand Name:Roudian