Features: Precise Physics Measurement: This pendulums experiment set features high precisions measurement scales and sensitive bearings to ensures accurate data collection. Ideal for demonstrating pendulums motion principles. Metal Construction: Made from metal materials, this pendulums apparatus resists deformation and corrosions better than plastic models. Its rugged design withstands frequent classroom use. Quick Assembly: It allows tool frees setups within minutes, saving teachers' preparation time. Perfect for fast experiment deployment during physics demonstrations or student group activity. Multiple Experiment Capability: Beyond pendulums studies, this versatile set demonstrates various physics phenomena including periodic vibrations and gravities acceleration. Stable Safety Design: The optimized weighted base and reinforced rack provide great stability during experiments, ensuring safe operations for students and beginners. Specifications: Materials: Metal Color: As The Picture Shows Weight: approx.680g Size: approx.11.5x9x41cm/4.52x3.54x16.14in Package Includes: Single Pendulums Experiment Device Setx1 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!