The Tungsten Phase II fly is a mayfly nymph from Solitude Fly Company and is similar to Yeager’s Crack Back PMD. The Tungsten Phase II is an attractive, realistic PMD nymph with a touch of yellow on the wingcase giving the appearance of the adult beginning to hatch. The Tungsten Phase II has great proportions and has a proven track record on the water. It sinks very quickly and is a great dropper fly to fish under your hoppers in June/July on most trout rivers.