This is a conch shell horn made under the supervision of a Yamabushi priest. It's a portable size for mountain climbing, and could be used as a bear-deterrent whistle! 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 seek 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 20mm, hole 6mm The taper of the mouthpiece is cut deeply, so it is relatively easy to produce sound. Length: Approximately 23cm Width: Approximately 9.5cm Weight: Approximately 233g