Features: Precise Demonstration: This metal pendulums resonance demonstrator accurately showcases physical mechanics principles with high precisions engineering. Its optimized design delivers clear resonance effects. Metal Construction: Crafted from premium metal materials, this physics teaching equipment withstands frequent classroom demonstrations and lab experiments. The robust build ensures long term reliability. Tool Frees Quick Assembly: Designed for educational efficiency, this physics lab apparatus sets up instantly without tools. Teachers can prepare demonstrations rapidly, saving valuable classroom time during physics lessons. Wide Applications: Beyond resonance phenomena, this demonstration device supports multiple physics experiments including momentums conservation and energy conversion. Ideal for STEM education. Safety Design: The metal construction provides great durability and ensuring safe classroom demonstrations. Educators can conduct physics experiments confidently with this safe teaching aid. Specifications: Materials: Metal Color: As The Picture Shows Weight: approx.2300g Size: As The Picture Shows Package Includes: 1Pc Resonance Demonstrator 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!