CE certification, Reusable KN95 mask, PTFE Nano filter membrane (More stable physical filtration) US$ 0.49 - 0.59 / Piece. 10000 Pieces (Min. Order) FOB Port: Ningbo. Freight Cost Available. Inquire Now Compare. Wenzhou Reliable International Trading Company Limited. 1st year China (mainland) Response: More than 72h.