With this adapter you can use a capable CO2 regulator with a Nitrogen or Argon tank. Not all CO2 Regulators are suitable for use with a Nitrogen tank. We only recommend use with regulators that are capable of handling Nitrogen and CO2 gasses. Your regulator will need tank pressure gauge that goes to at least 3,000 psi and out going pressure regulator that goes to at least 100 psi. CGA320 male thread by CGA580 male thread.