Carbo 500 in line carbonating machine for beverages.  can also be used to infuse nitrogen into your product.  Has only ever been used for ozonated water so in nearly new condition.  purchased in early 2020, we loved it and upgraded to a carbo 1000 this summer when we upgraded our canning machine.  uses a fraction of the nitrogen as compared to dosing and much cheaper set up.  will mix up to 500l per hour of product with either nitrogen or CO2