Description: 【Magnetic Effect Tube】: Our cathode ray tube demonstrates the deflection of ray at a magnetic field, illustrating that cathode ray are streams of charged particles emitted from the cathode 【Magnetic Field Effect Cathode Ray Tube】: This device showcases how cathode ray induce mechanical motion in objects, highlighting the momentum and energy possessed by ray 【Straight in Cathode Ray Tube】: Demonstrates the phenomenon that cathode ray move in a straight line and can be blocked by metal 【Static Electric Deflection Tube】: Witness the deflection of cathode in an electric field, confirming that ray consist of negatively charged particles, or electrons 【Application Scope】: Ideal for teachers in experimental classrooms to foster students' interest in physics and electricity. Please note that this glass product may incur damage during transportation Specification: Material: Glass Size Chart: Total Length: 25cm/9.84inch High: 20cm/7.87inch Base Diameter: 11.7cm/4.61inch Package Includes: 1 set Cathode Ray Tube Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.