This is a conch shell made under the supervision of a Yamabushi (mountain ascetic) priest. 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 item. 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, we ask for no claims and no returns. SPEC Wooden mouthpiece, lacquered finish, blowing hole diameter 23mm, hole 6mm The taper of the mouthpiece is cut deeply, so it is relatively easy to produce sound. Length: Approximately 30cm Width: Approximately 11.5cm Weight: Approximately 340g