Copper-based fly tying wire for ribbing, weight, flash, bodies, and brushes.Wapsi UTC Ultra Wire is a non-tarnishing copper-based wire for fly tying. Use it for ribbing, adding weight, flash, dubbing brush wire, and body components on nymph and streamer patterns. It also supports Copper John Nymph tying and segmented bodies made by wrapping two colors together.Key Features Non-tarnishing copper-based wire for fly tying applications. Use for ribbing, weight, flash, dubbing brush wire, and body components. Works on nymph and streamer patterns. Can form complete wire bodies or banded, segmented bodies with two colors. Product Details Small: all-purpose size for many fly tying needs. Brassie: suited for wire-bodied flies in sizes 18-22 and ribbing on most trout-sized flies. Medium: suited for ribbing on size 8-12 nymphs.