Material and Size: Made from pp materials, this demonstrator measures 29cmx13cmx28cm. Its compact size makes it easy to store while being sturdy enough for regular classroom use Physics Educational Tool: The 23036 Joule's Law Demonstrator is designed specifically for middle school physics education, this device uses air as the experimental medium, offering higher sensitivity and ease of use Feature: Suitable for teachers and students alike, this demonstrator aids in visualizing complex concepts related to Joule's law, enhancing the learning experience in classrooms or labs Versatile: This Joule's Law Demonstrator instrument is designed to effectively demonstrate the principles of gas laws, making it an essential tool for physics experiments and educational purposes Application: This experimenter serves as a great educational tool for students studying physics, providing them with hands-on experience in understanding the principles of Joule's law Specification: Material: PP Size Chart: 29cmx13cmx28cm/11.42inchx5.12inchx11.02inch Package Includes: 1 PieceJoule's Law DemonstratorPhysics Experiment Equipment Note: Please allow slightly errors 1-2cm differences due to manual measurement.