This is a craft item, a horn made from a cow's horn. When blown, it produces a sound similar to a conch shell. When a squeaker whistle is attached, it makes a cute "peep" sound (see photo 4). 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 seek perfection. It is also listed on other sites, so it will be removed when sold out. Thank you for your understanding. Regarding transactions, no claims and no returns are accepted. SPEC Wooden mouthpiece, lacquered finish, blowing hole diameter 22mm The taper of the mouthpiece is cut deeply, making it relatively easy to produce sound. Length: Approximately 20cm Width: Approximately 5cm Weight: Approximately 74g