The Hanak ECO+ tungsten bead offers a direct correlation between diameter and weight, and comes in gold. Gold remains the classic choice for traditional nymphs and brown, fawn, or olive-colored bodies. Sizes range from 2.30 to 3.80 mm and from 0.11 to 0.39 g; packaging: 50 pieces per bag. Compare weights rather than just diameters: it is the actual weight that will determine how the nymph behaves in the current.