Non – Jacketed. Used for 5 years in commercial brewery. Comes with all valves, PRV and carb stone. “This 1 bbl brite tank is highly favored for brewing craft beer, kombucha, cider, and any other beverage requiring carbonation. Similar to all our other brite tanks, this 1 barrel option serves multiple purposes including carbonating beer, acting as a tax determination tank, or functioning as a serving tank.”