White River Fly Shops Tungsten Beads are expertly polished and drilled for use in fly tying. Tungsten beads are twice as heavy as brass beads and even heavier than lead beads. Per 20. Sizes: 5/64, 5/32, 3/32, 3/16, 1/8. Colors: Black, Gold, Copper, Nickel. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Tungsten Beads.