Includes 1 - 16g threaded CO2 Cartridge Compatible with threaded 12g - 25g C02 Cartridges Compact, high pressure hand pump with integrated C02 cartridge inflator Rated to 120 psi Includes water bottle frame mount bracket with CO2 caddy(holds two cartridges) Leverless EZ-head works on Presta and Schrader valves, requires no disassembly Best of both worlds, manual hand pump and CO2 rapid fill tire inflation. Allows you to use it as a C02 cartridge inflator, or if you run out of cartridges you can always use it the old fashion way to inflate you tires again. Used but in great condition. One co2 cartridge is new, the other cartridge is used but has some pressure left in it.