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The Park Tool GP2C is one of our most successful products ever! We worked with 3M to produce a self-adhesive tube patch that stretches, flexes, twists, and turns right along with the tube. No messy glue, no bulky packaging. Lightly roughen tube with the included sandpaper, clean, apply patch, and you re ready to go. Six patches with sandpaper in a neat little carry along box.