These are conch shells (Acanthopleura japonica) that have been processed to resemble conch shells (Triton's trumpet shells). Set of 2. They can be blown and produce sound, but it will be a small sound. They do not produce a sound as loud as a conch shell from the Warring States period. They are a portable size for mountain climbing, and could be used as a bear deterrent whistle! 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 seek perfection. They are also listed on other sites, so please understand that they will be removed once they are sold. Regarding transactions, no claims and no returns are accepted. SPEC Wooden mouthpiece with urushi lacquer-style Kinran (brocade) decoration The taper of the mouthpiece is deeply cut, and a 6mm pipe is inserted, making it relatively easy to produce sound. Length: Approximately 13.5~14cm Width: Approximately 7~7.5cm Weight: Approximately 116~138g