UTC G.S.P. | OFF Fly Shop

Ultra GSP is the strongest thread on the planet. Boasting steel-like strength for its weight, this thread really lets you put the pressure on! Our gel spun polyethylete is supple, ties flat and is available in the largest selection of sizes and colors.

  • 50 yards
  • Ties flat with a minimum of bulk
  • The largest selection of colors and sizes anywhere

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