This is a conch shell that has been processed into a conch horn. It can be blown and produces sound, but it is a small one. It does not produce the same sound as a conch horn from the Warring States period. If you attach a whistle, it transforms into a shell whistle (see photo 4). How about using it as a bear 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 out. Regarding transactions, no claims and no returns are accepted. SPEC Wooden mouthpiece, lacquered finish, blowing hole diameter 17mm The taper of the mouthpiece is cut deeply, and a 6mm pipe is passed through, making it relatively easy to produce sound. Length: Approximately 11cm Width: Approximately 6.5cm Weight: Approximately 102g