This is a conch shell made under the supervision of a Yamabushi priest. It's a portable size for mountain climbing, and could be used as a bear whistle! 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. Regarding transactions, no claims and no returns are accepted. It is also listed on other sites, so please understand that the listing will be removed once it is sold. SPEC Wooden mouthpiece, blowing hole diameter 22mm The taper of the mouthpiece is cut deeply and a 10mm pipe is inserted, making it relatively easy to produce sound. Length: Approximately 36.5cm Width: Approximately 17cm Weight: Approximately 792g