Oyster shell powder, oyster shell, calcium powder, oyster shell powder, oyster, borei There are benefits for repeat purchasers, so please let me know in the comments before purchasing if possible. I am also selling the same item on Yahoo Flea Market. 200g is about 260ml. The prices and quantities are as follows. Please tell me the desired quantity in the comments. We have plenty in stock. ● 200g: 300 yen ● 300g: 360 yen ● 400g: 420 yen ● 500g: 470 yen ● 750g: 550 yen ● 1000g: 700 yen ● 1500g: 910 yen ● 2000g: 1100 yen ● 3000g: 1440 yen ● 4000g: 1650 yen ● 5000g: 1900 yen We also sell by grain size. Also, as a trial, we can include coarse or fine samples, so please comment if you need them. After washing away the salt, it is heat-dried at around 500 degrees Celsius and sterilized. The main component of oyster shells is calcium carbonate. For calcium supplementation for humans, small animals, birds, reptiles, and amphibians. For dusting and gut loading of insect feed. For adjusting the acidity of horticultural soil. At home, I mix it with tea or coffee, and use it for dusting Dubia roaches (Argentine cockroaches) and mixing it into the paste food for toads. Ingredients: Oyster shell (made in Miyagi Prefecture) Alkaline content 50.0% Nitrogen...0.2% Phosphoric acid...0.15% Potassium...0.03% Calcium...94.8% Magnesium...0.40% Silicic acid...3.09% Other trace amounts of manganese, boron, zinc, copper, iron, molybdenum, etc. When used as food for humans and living creatures, there is no expiration date or best-before date for oyster shells, but please use them within 2 years of opening as a precaution.