I have various other items for sale as well. This is an extra-large, thick-shelled Araflao Onishi conch shell. It's approximately 49.5 cm long and weighs a whopping 2417g. The mouthpiece hole is about 6.5 mm. It has natural growth marks. There are no cracks. It's a very beautiful and well-balanced Araflao Onishi conch shell. Please check the photos. The sound is a booming sound because of the thick body! (^.^)♪♪ Please, by all means, experience it in the mountains! This item offers the enjoyable resonance of the "Oto" sound. Secretly gaining popularity! ^ ^♪♪♪ I have confirmed that the conch shell sounds can be differentiated into 5 tones (Oto = wood and fire tones), (Kou-on = earth, metal, and water tones). If you need a beginner's conch shell blowing guide, please write in the comments section. I will include it for free. The price is determined by the cost of the shell.