The Hanak Round tungsten bead offers a direct correlation between diameter and weight, in black nickel finish. Black nickel is ideal for dark nymphs and rigs where you want to maintain a low-glare metal head. Sizes range from 2.00 to 4.00 mm and from 0.06 to 0.43 g; packaging: 20 pieces per bag. In shallow water, start with the smaller sizes; increase the diameter and weight when the current or depth requires it.