Possibly the worlds strongest fly tying silk for its diameter. The 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.
24/0 (20 denier) is recommendend to be used with ceramic bobbins.
At just 20D this has a breaking strain of 750gm or 26oz! This will lay flat and disapear yet still have incredible strength for fly tying micro flies.
Semperfli Nano Silk is possibly the worlds strongest fly tying silk for its diameter and regarded as the tying thread choice of professional fly tyers world wide.
Virtually unbreakable and still capable of being split down for dubbing twists there is no fly tying thread as stong as Nano Silk anywhere. With Nano Silk you will have confidence that even the smallest of flies can be tied without your thread breaking!
18/0 (30 dernier) use with ceramic bobbins and tungsten scissors.