Birzman Roar Control CO2 Inflator

The Birzman Roar Control features Birzman's patented 'Turn Pierce Function' with a built-in valve that allows for effortless, controlled inflation by turning the cartridge to increase, decrease or stop the flow of CO2. Turn the cartridge clockwise to puncture and close the valve; counter-clockwise to open the valve and release CO2. Compatible with both Presta and Schrader valves; 16 g threaded cartridges.