1.3 ounce bottle of Convertase AG 300. For creating beers with a very low ending gravity. Glucoamylase (Amyloglucosidase). This enzyme is used to break down complex starches and sugars so that beer yeast can ferment them. Allows for very low ending gravities. 1.3 oz bottle. Use 10 to 25 drops per 5 gallons of beer. Add at or near the start of fermentation.