This is a conch shell made from a channeled whelk shell. It is a small item and does not produce the same sound as a conch shell from the Sengoku period. It is capable of producing a sound. By attaching a whistle, it can be transformed into a shell whistle (photo 4). How about using it as a bear deterrent whistle for mountain climbing? Regarding the production, it has been thoroughly cleaned, disinfected, and processed, but it is a natural product. Please refrain from purchasing if you are sensitive or seeking perfection. It is also listed on other sites, so please understand that it will be removed once sold. Regarding transactions, no claims and no returns are accepted. SPEC Wooden mouthpiece, blowing hole diameter 12mm Length: Approximately 10.5cm Width: Approximately 7cm Weight: Approximately 76g