9.2% Alc. by Vol. Cameron’s Obsidian Imperial Porter (Rum Barrel Aged) is next in our successful Oak-Aged Series. Obsidian Imperial Porter is 9.2% ABV and is best served at 13 – 15C in a tapered glass such as a snifter. Dark & intriguing as the midnight sky, Cameron’s Obsidian Imperial Porter is loaded with magnificent and robust flavor. Aged for seven months in Caribbean rum barrels, roasted malt and chocolate character abound in this velvety, nectarous ale.