... our advanced technology is widely used in clinical respirator, protection respirator, and dust proof respirator. Products coincide GB6223-86Udc614.89 42CFR84 (U.S ... ,93, meet different clients demands to produce all kinds of respirator protection material.*Models and ParametersMask cloth --filter material for mask ... 70 0.6 98.99 4.5 Hight efficiency protection respirator polypropylene Filter material