The Hanak Classic brass bead exerts less drag on the rig than a tungsten bead of comparable diameter, in black nickel finish. Black nickel is suitable for dark nymphs and rigs where you want to maintain a low-glare metal head. Brass provides a more moderate weight than tungsten of comparable diameter. Sizes range from 2.00 to 4.70 mm and from 0.03 to 0.31 g; packaging: 20 pieces per bag. Choose the size based on the nymph’s shape and the desired sinking rate, then check how the bead moves along the curve.