The Ninja Pump is a popular compact combo pump by Portland Design Works. Part CO2 inflator, part hand pump, compatible with both Presta and Schrader valves. Its full alloy construction is tough, yet shiny. A control knob allows you to easily regulate the flow of CO2 to ensure a perfect pressure. Small enough to sneak into a jersey pocket or seatbag, the Ninja Pump excels under pressure and can fill even a high volume tire. Note: CO2 cartridges sold separately.