Features: Power up without relying on electricity using this hand operate hydraulic model generator. Perfect for classroom teaching props. Crafted from durable plastic, this compact and portable hand operate hydraulic generator is both environmentally friendly and energy saving. Designed for students seeking hands on physics education. Whether in classroom, science learning, this hand cranked hydraulic generator provides a reliable learning props for kids and students. Let kids and students learn more about the energy conversion through hydraulic generator DIY model kits. Specifications: Product Dimension: approx. 15x12x12cm/5.91x4.72x4.72inch Material: Plastic Suitable Age: Age over 6 years old Color:Random Package Includes: 1 Set Hydro Generator DIY Science Model Toy note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.