Park worked with 3M to produce a self adhesive tube patch that stretches, flexes, twists, and turns right along with the tube. The Park Tool GP-2C Pre-Glued Super Patch Kit has no messy glue and 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.