Image 1 of 1 ASTM Level II Medical Face Masks $0.00 ASTM Level 2 Standard F2100; exceeding 98% BFE (available as sterile/non-sterile). Available with and without FDA 510K. Quantity: Add to Quote Added! ASTM Level 2 Standard F2100; exceeding 98% BFE (available as sterile/non-sterile). Available with and without FDA 510K.