Flat Mylar Tinsel is excellent for tying bodies or for ribbing on nymphs, streamer patterns and wet flies.
Gold on one side, silver on the other. Per 2 spools. Sizes: Small, Medium, Large.
It is tough, can be wound on tight. I made the mistake of buying cold and silver, it has both colors (inside and out). I just got extra for a while, good tensil though.