Wapsi Dumbbell Eyes - Today the dumbbell eye is a widely used fly tying material and is used in many innovative fly patterns such as Bob Clouser's Swimming Minnow. Pioneered by Tom Schmuecker of Wapsi Fly Adds action, weight, and looks to a fly A critical component of the Clouser MinnowXSM: 5/32", 1/60 ozSM: 3/16", 1/40 ozMed:7/32", 1/30 ozLarge: 1/4", 1/20 oz