Features: Discover the fascinating world of electromagnetic induction with Magnetic Rotor Motor, brushless Hall motor perfect for science experiments and educational projects. from acrylic, metal magnets, aluminum alloy, and stainless steel, this device ensures longevitys performances during your exploration. for students, educators, and hobbyists interested in electronics and physics, offering hands on learning experiences. for classroom demonstrations, home labs, or science fair, this motor provide engaging way to explore fundamental scientific principles. With USB 5V power supply, the magnetic rotor motor is easy to integrate into various experimental setups, making it tool for both beginner and advanced. Specifications: Materials: Acrylic Size:18x5.50cm/7.09x2.17inch Package Includes: 1PC Magnetic Rotor Motor note: Please allow 0-1cm error due to manual measurement. make sure do not mind before bid. Due to the differenceS between different monitors, the picture may not reflect the actual of the item. Thank you!