CO2 inflator w/ cartridge pierce indicator. Our Black Zeppelin CO2 bike inflator is ultra light, sleekly designed and easy to use. It's precision-machined for strength and reliability. The pierce indicator on the Airflation(TM) control knob let's you know when the cartridge has been punctured and the device is ready to inflate your bicycle tire. - Precision-machined body and head for improved reliability and ease of use - CO2 pierce indicator reveals when CO2 cartridge is punctured and ready for use - Fits Presta and Schrader valves without adapters - Compatible with threaded cartridges - Small size fits in saddle bag or jersey pocket - Size: 45 x 32 x 21 mm - Weight: 24 grams (without CO2 cartridge)