An extremely compact, lightweight and easy-to-use CO2 inflator. Precision CNC machined aluminum inflator fits Presta and Schrader valves and works with threaded 16g or 25g cartridges. Simply screw the cartridge in tight and then screw the head onto the valve, unscrew the cartridge to release all the gas from the CO2 cartridge in seconds. Included CO2 Cartridge Shell protects your hands from cold cartridges during inflation.