The Lezyne Twin Speed Drive Co2 Inflator is a compact, 100% CNC machine aluminum CO2 inflator. The simple Threaded Valve Operation allows for easy inflation. The Twin Slip-Fit head presses onto Presta and Schrader valves for fast engagement. The two piece head design allows O-rings to be replaced when needed. It is compatible with threaded CO2 cartridges only, and comes with an anti-freeze jacket to protect hands during inflation.