Get Going Again Quickly The Topeak Tubi Master+ is a compact, all-in-one tubeless tyre repair kit and CO2 inflator. It makes quick work of repairing flats on the road or trail. The CO2 inflator head fits Presta & Schrader valves and carries a single threaded 16g or 25g CO2 cartridge. Everything in one Neat Package The tyre reamer, serrated knife and plug insertion tools fold away into the tool body, while a special concealed compartment holds repair plugs. A mounting module lets Tubi Master+ attach to seatposts or bike frames with an included strap. Added Features The Tubi Master+ has a safety lock for CO2 cartridge, knife blade & plug insertion tool lock, repair plug compartment, mounting module with strap, dust cap, and 3 pieces of 3.5mm x 5cm tyre repair plugs included. Quick Tubeless Tyre Repair 1. Plug Tool installs tyre plug for quick fix 2. Plug Retainer keeps plug in place during Plug Tool removal 3. Use Knife to trim excess repair plug material Easy, Fast, Inflation 1. Pull out the safety lock 2. Thread-in CO2 cartridge 3. Engage onto valve stem 4. Start and regulate CO2 flow by pushing inflation head onto valve stem 5. Ride