Total Pet Health diatomaceous earth is a naturally occurring fine powder composed of crushed fossils that has the power to kill fleas, ticks, and parasites naturally. Can be used externally to destroy the waxy outer shell of fleas and ticks or internally as a dewormer or to treat internal parasites. Contains 15 trace minerals. EPA approved as a food additive. Ingredients are fossil shell flour. Available in 5-ounce jar. Measures 3-4/5-inch length by 3-4/5-inch width by 3-4/5-inch height.