Feature:1. Made of high-quality materials, not easy to rust, durable.2. Professional manufacturing, stable characteristics, high reliability.3. Small size and lightweight, easy to install, convenient to use.4. It has a wide range of applications for children's science projects, physical/mechanical learning, and classroom teacher demonstrations.5. Removable design, each part can be disassembled separately, allowing students to learn more about the structure of the motor and how it works.Specification:Condition: 100% Brand NewItem Type: Electromotor ModelMaterial: IronN Pole: RedS Pole: WhiteMagnet Size: Approx.22x20x20mm / 0.87x0.79x0.79in Arc Diameter: Approx.42mm / 1.7inWeight: Approx.200g/7.1ozPackage List:1 x Base 1 x Crank Shaft2 x Bracket 1 x Commutator1 x Electric Drive Coil 1 x Pulley2 x Pole Shoe1 x Permanent Magnet 2 x Electric Brush2 x Binding Post Red + Black10 x M3 Screw + Nut 2 x M4 Screw + Nut 1 x Small Wrench1 x Instrument BoxNote:1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.