This is a conch shell (tsumetagai) that has been processed into a conch horn. Set of 5. It can be blown and makes a sound, but it's a small one; it doesn't produce a sound like a conch horn from the Warring States period. 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 Blowing diameter: 12mm Length: Approximately 6~7cm Width: Approximately 5~5.5cm Weight: Approximately 22~57g