Simple, effective and it gets to where the fish are holding - at the bottom. The tungsten bead head drops the tube-style body down, and it rolls along perfectly simulating a midge pupa. Ideal for stream fishing and effective on a wide variety of trout. Per 2. Sizes: 18, 20, 22. Colors: Black, Copper. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Flies.