Features: Precisions engineered mechanical transmission model with metal construction ensures accurate belt and chain drive demonstrations. Featuring tool frees modular assembly and clear visual components, this physics demonstration model allows instantly configuration changes. Ideal for STEM educators and physics students, this teaching aid enhances understanding of mechanical principles through hands on experimentation. Perfect for classroom demonstrations, laboratory experiments, and engineering workshops, great for visualizing actual gear interactions and power transmission processes. Combines industry component with educational functionality, offering a professional grade physics teaching tool that bridges theoretical concepts. Specifications: Materials: Metal Color: As The Picture Shows Package Weight: approx.230g Styles: (Optional) 5 Styles are Available as Shown in the Picture. Size: approx.12x8cm/4.72x3.15in Package Includes: 1Pc Transmission Model note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!