Add to Wishlist Quick view Choose Options Semperfli Nano Silk 30D 18/0 Semperfli Fly Tying Nano Silk 30D 18/0 Nano Silk Ultra 30D 18/0 is regarded as the tying thread of choice of professional fly tyers worldwide and is the best GSP thread on the market! Being so super strong and available in such a variety of colors and... MSRP: £3.99 - £18.00 Choose Options Compare