These are conch shells that have been processed into conch horns. Set of 7. They can be blown, but the sound produced will be of a moderate quality. Regarding the production process, they have been thoroughly cleaned, disinfected, and processed. However, they are natural items, so please refrain from purchasing if you are sensitive or seek perfection. They are also listed on other sites, so please be aware that they will be removed from sale if they sell out. Regarding transactions, we ask for no claims and no returns. SPEC Mouthpiece diameter: 12mm Length: Approximately 5-9cm Width: Approximately 2.8-4.6cm Weight: Approximately 12-62g