If it is a single-core with iron-core nose bridge, flat masks, about 3.5 million per ton. Bi Ting brand nose bridge uses special materials for the situation, which can reach about 4 million per meal, an increase of 15-20%. If it is made of all-plastic nose strips, one ton can generally produce 4 million pieces, which is about 5 million more than the Ting-brand nose strips, which is about 20-25% higher. If it is a KN95 mask, it is recommended to consult separately than to stiff the bridge of the nose.