porta cartucce topeak ninja co2Extreme flexibility is a hallmark of the Ninja series, and Ninja CO2 is no exception. Mount it on your bike with most bottle cages to match the look that suits you best. The included Micro AirBooster and 2 threaded 16 g CO2 cartridges make fixing flats easy with quick access through a simple twist. Material Aluminum engineering grade polymer Inflation head Presta Schrader Push to inflate Inflation material CNC Aluminum Compatibility Non adjustable