RIO's Sili-Leg Stonefly Nymph with Tungsten Bead
On scale of 1:10 - the sink rate on this fly is a solid 9. It's very heavy, sinks fast, and works the bottom both on contact nymph rigs and under strike indicators.
The Sili_Leg stone has been around for 12 years or so and relies on lead wraps for weight. With the explosion of Euro Nymphing people are wanting very heavy flies. We feel that keeping this fly the same but adding a tungsten bead to it will satisfy this desire for addition weight/faster sink rate.