The new CO2-BRA cartridge bike pump from Topeak fills a flat tire faster and more efficiently than your traditional bike pumps. This inflator pump has ergonomic shape and convenient thumb release button, allowing for an effortless one-handed inflation. The integrated safety indicator alerts you whether the common 16 gram screw-in CO2 cartridge is ready to go. CO2-BRA bike pumps also feature a special built-in dust cap to keep dirt from entering the inflation head of the pump. The CO2-BRA small size and light weight of 69 grams without cartridge means it fits easily in your jersey pocket. The inflator pump is designed to automatically fit Presta and Schrader valves. Topeak.