... medical face mask; 2,NELSON LAB,BFE>99%; 3,CE EN 14683:2005. Disposable masks.1, low price and high quality ... , cup, valve, spongePacking50pcs/box, 40boxes/ctncertificateNELSON LAB, BFE>99%, CE EN 14683:2005, EN149 FFP2Min order500pcsDelivery15 daysPaymentT/T or L/CApplicationDaily ... pls feel free to contact me. Thank you! Disposable masks used in electronic products' workshop