In many waterways, imitations of Stonefly larvae (called nymphs) are very effective early in the season. They have distinctive wing covers that previously required tying them in several segments, a time-consuming job that often gave everything to bulky flies. It is often absolutely crucial that imitations of nymphs have the right profile and measurements. With J:son's Stonefly Nymph wing burner, you quickly and easily create realistic and durable wing covers for imitations of brook dragonfly nymphs. Available in five sizes, all adapted to real brook dragonfly nymphs.