Description: Material: Made from quality pp material, this physics optical experiment set camera model ensures durability and longevity, allowing repeated use in classroom settings or personal studyProduct Size: With dimensions of 12.5cmx3.5cmx7.5cm, this camera model optical experimental equipment is compact and easy to handle, making it convenient for both teachers and students during demonstrationsEducational Tool: This camera model is designed to demonstrate the principles of convex lens imaging, making it an ideal educational tool for middle school physics and optical experimentsPackage Contents: Each package comes with a camera model 39001, teaching demonstration equipment that provides all the necessary components for a comprehensive physical optics experimentVersatile: This is a teaching aid for secondary school physics education, making complex optical principles easy to understand through hands on experiments Specification: Material: PP Size Chart: 12.5cmx3.5cmx7.5cm/4.92inchx1.38inchx2.95inch Package Includes: 1 PieceCamera ModelPhysics Optical Experiment Set Note: 1.This is not infant toy , please take away from children to avoid eating.2.Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.