Features: Learning Tool: This standing waves experiment model is integrating Science, Technology, Engineering and Math concepts to sparks creativity through hands on building experience. Demonstration Set: Clearly illustrates standing waves phenomena with visual experiments, helping students understand sound waves propagation characteristics in an engaging way. Safe & Friendly Materials: Made from safe, quality wooden materials that meet educational safety standards, ensuring worry frees use during classroom or extracurricular activities. Easy Assembly Process: Comes with clear step by step instructions for simple construction, suitable for students of various ages to complete independently or with teacher guidance. Reusable Educational Model: It allows repeated experiments and demonstrations, perfect for science classes, educational exhibitions, and fostering innovative thinking through practical exploration. Specifications: Materials: Wood Color: As The Picture Shows Weight: approx.73g Size: approx.18x6x8.8cm/7.08x2.36x3.46inch Package Includes: 1 Set of Science Experiment Tool 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!