Description: Product Type: This is a manual centrifugal precipitator, an important piece of equipment for physics experiments in middle school educationMaterial: Made from sturdy pp, ensuring longevity and resistance to wear and tearSize: The product dimensions are 10x15cm, making it compact and easy to store when not in usePackage Contents: Each package contains 1 complete set of the centrifugal precipitatorFunctionality: This hand-cranked model allows for easy using, fit for teaching students about the principles of mechanics in a hands-on manner Specification: Material: PP Size Chart: 10cmx15cm or 3.94inchx5.91inch Package Includes: 1Hand Operated Centrifugal Precipitator Note: 1.This is not infant toy , please take away from children to avoid eating.2.Please allow slightly errors 1-2cm differences due to manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.