... ,NELSON LAB,BFE>99%; 3,CE EN 14683:2005. Disposable masks.1, low price and high quality;2, with easy-to ... .5x9.5cm/14.5x9cmMaterial and weight20gPPx22gMBx25gPPStyleMedical, flat, ES purifying, active carbon, solid, cup, valve, spongePacking50pcs/box, 40boxes/ctncertificateNELSON LAB, BFE>99 ... problems pls feel free to contact me. Thank you! Disposable masks used in electronic products' workshop