A simple and reliable twist-to-inflate system, the Windstream Twist inflator head works with all 3/8" threaded inflation canisters -- but with a twist. With no spring on the head, airflow is controlled by twisting the cartridge rather than pushing. Auto seals when not engaged. - Compact, lightweight design fits in tight spaces - Press-on for both Presta and Schrader valves - Compatible with 3/8" threaded cartridges - Rotate CO2 cartridge to regulate inflation - Kit includes CNC-machined aluminum inflator head with a green finish for better visibility