Genuine Innovations Mountain Pipe CO2 Inflation Devices are inflators built just for the Mountain Bike rider with a mini back-up hand pump built right in for inflation security.Twist-To-Inflate technology for fast, easy & controllable CO2 inflationCO2 cartridge stores in handle when not in use and doubles as handle extension for manual inflationBuilt in mini containerMagnet lock feature keeps the barrel locked and closed securelyValve interface: Slip on for Presta valve. For Schrader, attach included Schrader valve adaptorORM-DItem SpecificationsCartridge TypeThreaded