This is a commercial tie. It is meant to be a chironomid-midge pupa pattern. I think the abdomen here has a unique look (underwrap of silver tinsel and overwrap of black vinyl wrap). The tail and gills are a white antron-synthetic fiber. The wingcase (over top of thorax section) is a black material that could be any flexible-stretch material. It could be a clear material and darkened with black permanent marker. The thorax is the ever wonderful peacock herl. It could also be Peacock Ice Dub, chopped fine and dub. The bead is a silver bead. The hook appears to be a 200R or similar straight eye hook (as opposed to the more frequent down eye). The hook is a size 14. So, that abdomen of silver tinsel and black vinyl ribbing is my favorite component of this fly.