Quick Connect CO2 Adapter with 60in Stainless Steel Hose Pressure Gauge & Exhaust Valve, CGA320 CO2 Cylinder Tank Direct Adapter to Sparkling Water Soda Maker for Terra DUO Art Gaia Aqua Fizz

This is the one I bought. https://www.amazon.com/dp/B0FMXZ8N2K?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1 I have the quick-connect system, so this works with it. It's pretty easy to tell, as the connector to the unit is pink.