Hareline Tyers Glass Beads are an outstanding fly-tying material for tying midge-size flies, small emergers, and nymphs. A single bead at the head of the fly, which diffuses light and refracts sparkle, can make a significant difference in the amount of strikes per day as well as the ferocity of strikes. Fits Size 18-24 hooks. Approximately 100 beads per package. Color: Silver, Iridescent Crystal, Transparent Red. Cancer and Reproductive Harm- www.P65Warnings.ca.gov.