Semperfli Nano Silk Fly Tying Thread - Nano Silk 100 Denier Predator 6/0 is ideal for your salmon, predator, saltwater, streamer, nymph and dry flies and is ideal for spinning deer hair. Super strong, this is the highest quality thread available. Never worry about snapping your tying thread again - you can rely on Nano Silk 100 Denier Predator 6/0. Nano Silk 100 Denier Predator 6/0 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 deniers it has endless possibilities and can be used for predator, saltwater flies and deer hair spinning. It is 10 times stronger than steel of the same diameter!. Nano Silk 100 Denier Predator 6/0 is designed for flies sizes #10 to 2/0. Because Nano Silk lays perfectly flat you get no thread build up. 6/0, 100 denier thread Breaking strain 8.4lb perfect on hook sizes #10 to #2/0 Lays perfectly flat with no build up, regardless of how many loops you put on the hook 10 times stronger than steel of the same diameter Thickness: 100D (Metric) 6/0 (Imperial) Breaking Strain: 8.4lb Material Type: Gel Spun Polyethylene (GSP) Product Packaging: Spool