[Product Type]: This is a manual centrifugal precipitator, an important piece of equipment for physics experiments in middle school education [Material]: Made from sturdy plastic, ensuring and resistance to wear and tear [Size]: The product dimensions are 10 x 15cm, making it compact and easy to store when not in use [Package Contents]: Each package contains 1 complete set of the centrifugal precipitator [Functionality]: This hand-cranked model allows for easy using, fit for teaching students about the principles of mechanics in a hands-on manner Color: As shown Material: plastic Package Contents: 1 * Operated Centrifugal Precipitator set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.