Specification Name: 3-ply nonwoven face mask/face mask ultrasonic Application: hospital, dental, clean room , food preparation and industrial environments. Style: ear-loops / tie-on Material: Outer coverstock white --25g/35g/40g polypropylene spunbonded Inner coverstock light green/pink/blue --16g-25 polypropylene spunbonded Middle filter medium white --20g/25g meltblown filter Color: white, green, blue, yellow, or pink .Etc. Packing: 50pcs/box, 2000pcs/ctn Store: store in dry, humidity below 80%, ventilated, non-corrosive gases warehouse 50pcs/box, 2000pcs/ctn, dimension:52x38x30cm