The Black Abbey Stained Glass Series of beers are an ongoing collection of brewery-reserve small-batch limited-release beers. The Stained Glass Series is brewed especially for the brewery taproom, Fellowship Hall, and released in small amounts, on draft only, to select bars and restaurants. The Stained Glass Series beers are separated into 2 categories based on ABV. SGS beers above 7% are called Stained Glass Alpha, below 7% are Stained Glass Omega. No two SGS beers are ever the same, so enjoy them when you find them!