Four Roses Single Barrel OESK 750ML tennessee whiskey The resulting eau de vie matures for The dual barrel aging The resulting eau de vie matures for a full decade in barrels constructed from 80 year old Limousin oak sourced from central France — a practice the distillery adopted in the late 20th century that imparts the deep complexity characteristic of premium aged brandies slight residual richness where temperatures vary by only about 8 degrees Fahrenheit from top to bottom — a fraction of the 30–35 degree swings common in traditional multi level rickhouses Four Roses Single Barrel OESK is typically available in the standard 750ml bottle size as a private barrel selection