MTB CO2 Inflator Kit Help riders quickly inflate their tires and get back to riding in no time, Compact and durable CNC-machined inflator head with soft-touch press down button for easy CO2 release, 25g cartridge size for MTB - up to 30 psi from flat , Dual head nozzle compatible with Presta and Schrader valves, Neoprene sleeve to help avoid ze burn, Each kit contains two cartridges, CO2 cartridges cannot be transported on an aircraft.