Roar Control features Birzman's patented 'Turn Pierce Function' with a build-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; 16g threaded cartridges

Specifications
Head: CNC machined aluminium (valve head), Neoprene (grip)
Size: 4.2 x 2.3 x 1.4cm (valve head)
Includes: 3 x 16g cartridges & 1 neoprene grip