Twist-to-inflate technologyTM: Twist the cartridge to open and close the valve, and to control the flow of CO2 * Works with Big Air! and Innovations threaded CO2 cartridges * Push on for Presta, screw on for Schrader valves * High strength, glass-reinforced nylon, with brass valve internals * Size / Weight: 26mm x 39mm x 18mm; 1.25? x 1.75? x .70?; 1.38oz, 38g