Genuine Innovations' Second Wind Road Combo gives you the speed and convenience of a CO2 inflator with the security of a hand pump. It fits Presta valves and accepts threaded CO2 cartridges. Should a second flat find you without an additional cartridge the Second Wind functions as a hand pump as well. Plus, the Second Wind is 7 inches long, comes with a 16-gram cartridge, and easily attaches to your bike with the included mount.