A. SIZE: 260mm x 110mm B Composition: Non-woven fabric, Melt blown filter, steel wire, Earloop(4layers) C Purpose of use: Protect the respiratory system against a source of infection (virus) 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