From Bruichladdich Website:

This limited edition Octomore 13.4 explores the astounding flavour produced when Octomore, the worlds most heavily peated spirit, is influenced by virgin oak American virgin oak to be precise.

SPECIFICATIONS

BARLEY PROVENANCE:100% Scottish grown Concerto barleyMALTING:Super Heavily PeatedDISTILLATION:Distilled in 2016 from the 2015 harvestAGE:5 Aged YearsMATURATION PROFILE:First fill ex-American whiskey and 300 litre American virgin oak cask maturationPHENOL LEVEL:137.3 parts per million (PPM)STRENGTH:61.6% ABV