MUUNN Faceted slotted beads are made of 97% tungsten, bead head will sink fast. Tungsten is much denser and harder than brass beads. Slotted diamond faceted tungsten beads for fly tying. Slotted Tungsten beads have 2.0mm 2.3mm 2.5mm 2.8mm 3.0mm 3.3mm 3.5mm 3.8mm 4.0mm , a total of 8 sizes; Gold(24K real gold coating), Silver, Copper, Black Nickle, Plain, a total of 5 colors. No fading, Anti-corrosion. Tungsten faceted slotted beads in our "MUUNN FISHING" store will be guaranteed to be well-formed and consistent in color and quality when the package is dispatched.