... material: widly used in medical health gauze mask; protecting mask; dustproof mask. JH series dustproof/mask filter,using superfine fibrous filter medium which ... .They are widly used in medical health gauze mask,protecting mask,dustproof mask and so on. According with GB6223-86UDC641.89 ... of EU.There usually are N95,N99,N100,P1,P2,P3.FILTER MATERIAL FOR PLANE RESPIRATOR ITEMWEIGHTTHICKNESS(mm) 10.6L/MM ...