Ultra compact CO2 inflation kit features a Nano AirBooster CO2 inflator and two 16g CO2 cartridges. Mounts to saddle rail with included Duo Fixer which provides dual use with Topeak Duo Fixer system accessories, including Topeak QuickClick saddle bags, Tubi tools, CO2 inflators, lights, and fenders. A simple slide and click is all it takes to go on a safe and secure ride.