Perfect for emergencies, the Topeak Nano AirBooster 16G is extremely lightweight, compact and easy to use CO2 inflator. Precision CNC machined aluminium 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.Presta / Schrader valvesCNC Aluminium1pc threaded 16g CO2 cartridge and shell included2.8x1.5x1.5cm8.2g (w/o CO2 cartridge)