The Topeak Nano AirBooster is an extremely compact CO2 inflator. The CNC-machined aluminum pump head fits both Presta (SV) and Schrader (AV) valves. To pump, the head is securely screwed onto the included cartridge and then attached to the valve. With a half turn counterclockwise, the cartridge is activated, and the tire is inflated in seconds. The cartridge cover protects your hands from the cold produced when releasing the gas. As a special feature, the pump can also be used as a holder for the tubeless insertion tool (tubeless insertion tool not included). Features - Compact, CNC-machined aluminum pump head - Fits Presta (SV) and Schrader (AV) valves - Pump head compatible with Topeak 16 and 25 g CO2 cartridges - 16 g CO2 cartridge included - Cartridge cover to protect hands from cold during pumping - Dimensions: 2.8 c 1.5 x 1.5 cm (without cartridge) - Weight: 8 g (without cartridge) Delivery includes - Topeak Nano AirBooster CO2 pump - Includes 16 g CO2 cartridge and cold protection cover