The cannondale airspeed co2 mini pump a compact high pressure mini pump and co2 inflator all in one with simple thread on headmaster valve stem head fits both schrader and presta valves cannondale airspeed co2 mini pump features simple thread on headmaster valve stem head fits both schrader and presta valves compatible with threaded 12g to 25g cartridges two 16g co2 cartridge included all aluminum alloy barrels fully serviceable seals and head parts for a lifetime of use in