This bottling is a blend of two Kentucky Straight Bourbons, one with a mashbill containing rye and the other with a mashbill containing wheat, and from different floors of two different rickhouses. The result is a unique four-grain bourbon (corn, barley, wheat and rye) that is bottled at cask-strength (127 proof). Heaven Hill recommends a splash of cool water added to this whiskey to fully appreciate the flavors and aromas of this bourbon.