Oyster Shell Powder, Kaki-gara, Calcium Powder, Borei-ko, 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 approximately 260ml. The quantities and prices are as follows. Please select. ● 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 I also sell different grain sizes. Also, as a sample, I 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 shells (Miyagi Prefecture) Alkaline content: 50.0% Nitrogen: 0.2% Phosphoric acid: 0.15% Potassium: 0.03% Calcium: 94.8% Magnesium: 0.40% Silica: 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.