Description     Made of, strong and durable material for a long time. Suitable for laboratory, physical and electrical experiments use. Happy and easy to learn. Exercise your student practical ability. Convenient to assembly, easy to carry, portable generator for experiment use. The efforts and fine craftsman we put into the making of this product make for superior reliability.     Features     - Color: Assorted color.  - Material: Plastic, metal.  - Size: 17.30X8.80X12.00cm/6.80X3.46X4.72 inch.  - The product is a hand generator for physical and electrical experiment use.  - Manufactured with the purpose of durability, this product would spend an eminently long period of time with you.  - Smooth surface, burr, stable longevity. They are not easy to damage.  - A perfect experiment equipment for your student to study scientific knowledge.  - Students will learn from the mechanics of the hand-crank generator and how the energy is used to generate electricity. 1 x Hand Generator