With the rapid development of new coronaviruses, many countries have fallen into a crisis of closure, which has seriously affected our normal lives.We know that the main route of transmission of this virus is droplets of the respiratory tract, so everyone wearing a mask is a very effective protection method, but some unscrupulous businessmen have pushed up prices and sold an ordinary mask to US $ 20, which made many people unable to burden.We have cooperated with a medical institution to purchase a large number of low-cost KF94 masks. If you need to purchase a large number of masks, please contact us to ensure that you will get masks at a reasonable price.