Exhalation Valve Filter Valve for Dust Mask Danfa Glass Limited Base Info Model NO.：HW0404Trademark：HeavenTransport Package：in BulkSpecification：OD37mm ID 27mmOrigin：ChinaHS Code：39269090 Description Pre：Latex Glove Examination Glove Powder Free Next：KN95/FFP2/N95 Melt-Blown Nonwoven Fabric 4 Ply Medical Supply Anti Dust Disposable Protective Face Mask
