WLP833 German Bock Lager Yeast. From the Alps of southern Bavaria, this yeast produces a beer that is well balanced between malt and hop character. The excellent malt profile makes it well suited for Bocks, Dopplebocks, and Oktoberfest style beers. Very versatile lager yeast, it is so well balanced that it has gained tremendous popularity for use in Classic American style Pilsners. Also good for Helles style lager beer. Attenuation: 70-76. Flocculation: Medium. Optimum Fermentation Temperature: 48-55F. alcohol Tolerance: Medium-High.