We can supply any amount of KN95 masks, with very short lead time. and delivery time 3-6 days anywhere in the world by DHL express shipping. KN95 is an industry-standard and means that the mask provides the intended effectiveness of filtering 95 percent of particles with a mass median diameter of 0.3 micrometers. Therefore, our mask can protect you well from PM10, PM2. 5, and even smaller particles.