CO2 Cylinder Tank W21.8 CGA320 Adapter Converter For Aquarium Fish Tank OU
Type1: W21.8 convert to CGA320, inner thread: W21.8; out thread: CGA320. Type2: CGA320 convert to W21.8, inner thread: CGA320; out thread: W21.8. It allows you to attach a paintball CO2 tank to your existing keg system CO2 regulator.