*CO2 cartridges not included* 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. * Use only Topeak CO2 cartridges INFLATION Fits Presta and Schrader valves.Works with threaded 16g or 25g cartridges DUAL FUNCTION USE WITH INSERTION TOOL Repair and inflate tubeless tires in one quick stepPlug Insertion Tool Kit available separately FOR PRESTA VALVE 1. Thread in CO2 Cartridge2. Loosen valve core before inflation3. Start and regulate CO2 flow by 1/2 turn to release CO24. Stop the CO2 flow by tightening the CO2 cartridge into Nano AirBooster FOR SCHRADER VALVE 1. Install and thread inflation head onto Schrader valve2. Thread in CO2 cartridge3. Start and regulate CO2 flow by 1/2 turn to release CO24. Stop the CO2 flow by tightening the CO2 cartridge into Nano AirBooster WEIGHT 8.2 g / 0.29 oz SIZE 2.8 x 1.5 x 1.5 cm / 1.1” x 0.59” x 0.59” MATERIAL CNC aluminum HEAD Presta / Schrader valves