Got a hole in tubing you don't want? Goof plugs to the rescue! These sturdy plugs eliminate the laborious task of removing, sizing, and replacing damaged tubing by sealing holes on the spot. Our goof plugs have different sized ends and are designed to plug holes small or large. Push them in by hand; a fitting inserter tool such as the 3-n-1 Hole Punch Tool or 4-n-1 Cut N' Punch Tool will also do the trick. Works on 1/2 in., 5/8 in., and 0.710 in. tubing. The plugs come conveniently attached together and snap off when ready to use. Goof plugs are made of polypropylene (PP) treated with UV inhibitors.