Glass fiber 1.100% pp nonwoven cloth 3.High efficiency, low resistance 4.stable quality ZF Glass fiber fabric:Superfine fiber filter material produced by our advanced technology is widely used in clinical respirator, protection respirator, and dust proof respirator. Products coincide GB6223-86Udc614.89 42CFR84 (U.S.) En149 (EU). N95, N99, N100, 91, 92,93, meet different clients demands to produce ...