Medium toast Hungarian Oak Cubes. Can be soaked in rum, bourbon, whiskey, wine, or vodka prior to use for added flavor. Good for use in stouts, brown ale, sour beers, or any other style with which barrel-aged flavor is desired. For post-fermentation use. Easily added & removed from carboys. Use 3 oz per 5-6 gallon batch for 20-30 days. 3 oz package.