These rubber mixing bowls are ideal for combining investment powder with water for lost wax casting. The flexible rubber makes the mixed investment material easier to pour into the casting flask. Measures 9" in diameter by 10" in height. Please contact us with any questions. Please visit our store for other great jewelry tooling items such as; Hand Stamps, Disc Cutters, Polishing Compound, Buffers, Hammers, Tweezers, Mandrels, Anvils, Vises and more! Thanks for Looking!