The AirBooster is an incredibly small, lightweight and easy to use CO2 inflator. Precision CNC machined from solid aluminum, the angled head AirBooster fits Presta and Schrader valves and its special design allows the user to adjust the flow while filling the tire. Double-ended design allows cartridge storage. The supplied durable silicone CO2 Sleeve protects hands during inflation. * Use only Topeak CO2 cartridges.