The DynaPlugger is a simple, rugged, rad way to repair your tubeless tire. Just find the puncture, align the tool, push into puncture, pull out and the plug stays in place. Now you're ready to get back to shredding! Dynaplugger is a molded of Glass-Filled Nylon. Even though it weighs only 35 grams, this tool is extremely strong. The push-on silicone end cap can store an extra insertion tube and seals the interior storage compartment. What's in the box:1 - Dynaplug DynaPlugger Tool4 - Standard Plugs1 - Standard Insertion Tube1 - Mega Insertion Tube1 - Pipe Cleaner Tool Body Construction Glass Filled Nylon Body and Cap / 6061 Aluminum Insert / Silicone End Cap Dimensions 4.875” x .875” Weight: 35g Insertion Tube Hardened 303 Stainless Steel Plug Material Viscoelastic Impregnated Rubber Plug Tip Nonabrasive Brass/ 6061 Aluminum