This is a conch shell made from a processed Yatsushirogai shell. It can be blown and produces sound. By attaching a whistle, it transforms into a shell whistle (see photo 7). How about using it as a bear deterrent whistle for mountain climbing! Regarding the manufacturing process, 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. Regarding transactions, we ask for no claims and no returns. SPEC Wooden mouthpiece, folk craft processed Length: Approximately 11cm Width: Approximately 6cm Weight: Approximately 28g