nonwoven disposable medical face mask 3ply with filter paper size:17.5*9.5cm elastic band 50pcs/box,40boxes/ctn nonwoven disposable medical face mask3ply with filter paper size:17.5*9.5cm ear-loop elastic bandcolor: blue, green, white50pcs/box,40boxes/ctngross weight:7kgnet weight: 6kgctn size: 52*38*30cm THR-6003 nonwoven disposable medical face mask with filter paper