... various type 2-ply, 3-ply, 4-ply, earloop and tie-on size: 14x7cm, 15x9cm, 16x9cm, 17.5x9.5cm non-woven face mask, 2-ply, 3-ply, 4-plySanitation ... dust6) Used for clinical and workshopSpecification:1) Material: 2-ply 20gsm PP + 25gsm PP3-ply 20gsm PP + 20gsm filter paper+ 25gsm PP2) ... 16x9cm (for adult use), 15x9cm (for young), 14x7cm (for child)3) Nose bar: 10.5cm, 9cm4) Packing: 50pcs/box, 40boxes/ ...