A3 Enamel Unidose refill, pkg of 20 Herculite Ultra Composite is a universal nanohybrid dental composite. Herculite, which has been considered the gold standard of dental composites for more than 20 years. Herculite Ultra employs the latest in nanoparticle technology, this universal composite features optimal handling and high polishability, lifelike esthetics, great wear resistance, and increased radiopacity. The resin matrix and Vita shade matching inherent in other Herculite brands are retained in Herculite Ultra. Ideal translucency, wide shade selection, and Kerr's Point 4 filler system provides excellent blending, making dental restorations undetectable. Features and Benefits Optimal handling, non-slumping Superb ease of placement Long-lasting polishability