Different grades of natural cork exist, but the pinnacle is our 100% TCA free cork. This is a bold statement to make, but through investment in technology, each cork can be examined for releasable TCA content (below the 0.5 ng/L detection limit; analysis performed in accordance to ISO 20752). Where your spirit demands the best, ensure your cork guarantees that it will be drunk, just as you intended. No interference, no taint.