SemperFlash Mirror is comprised of colored mylar strands treated to give different effects of light diffusion, intensity and reflection. Each 1/69 inch strand is lightly crimped to provide for movement in the water which, in turn, lends sparkle and variety to the light's effects. The strands are bound into hanks at their ends, providing a 10-inch length of usable material - no cinching in mid-strand to pinch the material. 300 strands per package.