Flash Nano Hybrid Composite 1 x 5gm Refill Pack Shade A1 by Medicept OPTIMUM PARTICAL NANO HYBRID COMPOSITE FLASH is a light cured resin based composite dental restorative which contains approximately 76% by weight (57% by volume) inorganic filler with an average particle size of 0.4 microns. All shades are radiopaque. FLASH represents years of research aimed at bridging the gap between microfill and hybrid composite materials. A proprietary grinding process combined with sophisticated rheological modifiers allow FLASH to polish to a very high, long lasting luster similar to microfills, while providing strength equivalent to todays microhybrids. It is recommended that the composite be stored at ambient temperature. Shelf life of FLASH is 3 years from manufacture date.