These are conches made from Akanishigai (a type of sea snail). Set of 5. They can be blown and make a sound, but it will be a small sound. They do not produce the same sound as a conch shell from the Sengoku period. Regarding the production, they have been thoroughly cleaned, disinfected, and processed, but they are natural items. Please refrain from purchasing if you are sensitive or seeking perfection. They are also listed on other sites, and will be removed once sold out, so please understand. Regarding transactions, no claims and no returns are accepted. SPEC Brass mouthpiece, blowing diameter 12mm Length: Approximately 7-9cm Width: Approximately 4.5-6cm Weight: Approximately 31-69g