Perlick Co2/N2 Draft Beer Gas Blender Ale/Lager/Stout Beer Kegs. This Gas mixer is in great condition and was used to Carbonate and push draft beer for 30 plus kegs to beer faucets at Restaurant/Bar/Club. Removed from working system after close of Auction day. Systems like this are also used in Brewery/ Craft Beer locations for a great balance of carbonation of draft beer. This blender produces a 70% Co2/30%N2 blend for Ale/Lager Beers and a 25% Co2/75% N2 blend for Stout nitro beers like Guinness, Porters. Adjustable supply knobs for 0-60 PSI supply feed to beer cooler. No Warranty on this Blender. Feel free to visit my listings to see the other beverage gas delivery systems you might be looking for.