The perfect bead for tying small nymphs and emergers. Glass beads are a fantastic option for mayfly and midge imitations, and even great accents on caddis patterns! Pat Dorsey's Mercury series are tied with a clear (or mercury) glass bead. This includes the Mercury Baetis, Mercury Pheasant Tail, Mercury Black Beauty, Mercury Midge, Mercury RS2 and the mercury blood midge among many others. 

X-Small Beads: Hook Sizes #20-24

Small Beads: Hook Sizes #16-20

*Over 100 beads per pack