Ultra GSP is the strongest thread on the planet. Boasting a steel-like strength for its weight, this thread really let you put the pressure on! The gel spun polyethylene is supple, ties flat and is available in the largest selection of sizes and colors. Choose 100 Denier for all round versatility for fresh and saltwater flies. Approximate breaking strength is 8 pounds for 100 Denier.
Black, Red, White