I have various other items for sale too! This is a compact, thick-shelled conch shell used in Shugendo practices. It's approximately 30cm long and weighs 606g. It produces both the "otsu" and "kan" tones well. (^.^)♪♪♪❣️ Please take a look at my profile. ^ ^♪♪ The mouthpiece hole is about 6mm. It has natural growth marks. There are no cracks. Please check the photos. Free shipping nationwide! ^ ^❣️ If you need a text on how to play the conch shell for beginners, please write in the comment section. The price is based on the cost of the shell.