Backun Lumiere Cocoboro 66mm I purchased this but have rarely used it as I mostly use a 65mm barrel. The Lumiere barrel features elegant curves and a flowing design. It provides a consistent sound from ppp to fff, offering a sweet tone. This is a new product that I confidently recommend, possessing both outstanding appearance and sound quality. Cocobolo has a warmer and slightly darker tone compared to Grenadilla.