Aventik brass beads are of genuine material and top quality finish for use on both nymphs and streamers. Tapered drilled hole in the beads allows the beads easily and smoothly to slide around the hook bend. 100pc pack a great value for fly tying. Top quality 100% satisfaction. Color: gold, nickle, black nickle, copper, silver, fluro pink, fluro red, fluro orange, fluro yellow, fluro black. Size info 2.4 mm (3/32") for hook size 14-18; 2.8 mm (7/64") for hook size 12-16; 3.2 mm (1/ 8'') for hook size 10-14; 4.0 mm (5/32'') for hook size 8-12; 4.8 mm (3/16'') for hook size 6-10.