A. Size175mm X 95mm B. Composition: Non-woven fabric, Melt blown filter, steel wire, Earloop(3layers) C. Purpose of use: Prevent infection(Medical, Surgical ) D. Filter performance: 99.9% particle blocking capability E. ASTM Level 3(510K) F. Key consumers: High-risk COVID-19 group, patients and workers at medical institutions G. FDA DEVICE CLASS 2