The Roadies spoke, and we listened. This inflator is made for Presta valves only. It can be used as an instantcontrollable CO2 inflator or high pressure hand pump capable of reaching a pressure of 130 PSI. At 7 this inflator is short and sweet and guaranteed to get you back on the road in seconds! Works with Genuine Innovations 12 or 16 gram threaded CO2 cartridges ONLY. Comes with one Genuine Innovations 16g threaded CO2 and bottle cage pump mount. Features: Uses Genuine Innovations' Twist to Inflate CO2 Flow Control Technology. Works ONLY with Presta Valves. Manual hand pump, 130 p.s.i. maximum. Designed for performance minded riders who prefer the ease of CO2 powered inflation and back up manual pumping. Size: 22.8mm x 20.8mm x 183.1mm. 900 x .820 x 7.212. Weight: 2.211 oz 62.7 grams. Construction: Aluminum pump body with high strength glass reinforced nylon, and brass valve internals.