Features: This instrument describes the type of the rotating magnetic field and the principle of a three-phase induction motor. Learning more about science technology and physics experiments by our phase motor principle demonstrates. Physics teaching tool can improve kids intelligence development, hands and brains ability. Incredible tool for physical laboratory equipment or as a decoration in your laboratory that make the learning of physical experiments efficiently. Suited for schools, educational displays and collectibles. A great addition to your laboratory equipment. Specifications: Component: Plastic, Metal Size: about 14.5cm/5.71'' Package Includes: 1 Set Three-Phase Motor Principle Demonstrates(Random Color) note: Please allow 1-3cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.