Fly Tying Semperfli Nano Silk 18/0 (30D) Black 100m Fly Tying Thread

Semperfli Nano Silk Ultra - Amazingly slim, Ultra Strong 18/0 fly tying thread.

Possibly the worlds strongest fly tying silk for its diameter. Nano Silk Ultra is ideal for flies sizes 18 and smaller. And you can still split it down further or use it to tie dubbing loops!