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Topeak Airbooster 25g inflator. 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 inflating the tire. Double ended design allows for cartridge storage. The supplied durable silicone CO2 sleeve protects your hands during inflation. * Only use Topeak CO2 cartridges.