New, unused flute head corks. 20 pieces These are flute head corks, genuine products of the musical instrument company YA, made by the person who used to make them. Made with natural Portuguese cork. H: 33mm, Diameter 18.5mm, Inner Diameter 4.0mm The only person in Japan who processed and manufactured corks for musical instruments has passed away. These are items that were handled by that person. In accordance with the deceased's will to supply them at a fair value, they are being sold this time. Sales will end when stock runs out. The only workshop in Japan is gone, so some items will disappear completely from the market in the future. Commercially available beautiful corks are bleached or have holes filled with powder, but natural corks have stains and holes as they are, so please understand. Sales will be used for the activities of protecting cats. It's sad, but because there are many people who resell purchased products as they are, even using the images without permission on Amazon, etc., I have written "No Reselling" on the images. Instrument adjustment, maintenance, musical instrument workshop, wind instrument repair workshop, cork replacement, overhaul