... 2.5mm,3.0mm,4.0mm thickness... Round and flat are all available Disposable Face Mask Ear ... ,5 muelces...Quick delivery1, Used in Hospital or by normal citizen, Approved CE & ISO certificates2, Anti-Flu, ... of non-woven fabrics3, BFE95%, BFE99% filter paper and Normal filter paper4, Standard mask size: 17.5cm*9.5cm ... Standard Ear loop Length: 17-18cm5, Tie On and Ear Loop (round or flat elastic)6, Package: ...