AI-CG3-3KT-SS and are rated to 3000 PSI maximum working pressure. Connects to a maximum 3000 PSI nitrogen tank with a CGA 580 connection. Do not use on accumulators with a pressure higher than 3000 PSI. It is highly recommended that a N2 gas regulator be used while charging any accumulator. Use dry nitrogen gas (N2) only. Download a PDF of the Specifications Sheet