Saflager s-23 is widely used by Western European commercial breweries and will produce the best of its Lager flavors when fermented at low temperatures (51-59 deg. F) yet producing very good beers at room temperature. Genuine bottom fermenting commerical yeast for lager beer production. Sedimentaion is high, Final Gravity is medium. Use one 11.5 g package if pitching at room temperature into 5 gallons. Use two packs if pitching at lager (51-59 deg F) temperature into 5 gallons. 11.5 gram pack.