Topeak AirBooster Pro CO2 Inflator. Features: Save your hand from freezing with the AirBooster Pro as the cartridge is stored internally CO2 release is easily controlled by pressing the button on the back of the inflator head Compatible with 16g cartridges only CO2 cartridges sold separately Specs: Model:Airbooster Pro Description:Inflator Head:Presta/Schrader CO 2 Included:No Color:Black Weight:53g