Feature 1Electrostatic Experiment: This foil electroscope is suitable for electrostatic experiment, to check whether the object is charged and whether the charge of the object is positive or negative. 2Hands on Learning: This physics electrometer is perfect for a hands on classroom experience, mainly used for electrostatic experiments in middle school physics teaching. 3Designed with Protractor: This foil electroscope demonstrator is designed with protractor, which be used as a pointer electroscope, convenient for teaching and demonstration. 4High Sensitivity: These foil electroscope teaching tools feature high sensitivity, easily test the insulation of objects and demonstrate induction charging, etc. 5Compact Structure: This foil electrometer has light weight and compact structure, stable performance, easy to operate and carry.Item Type: Foil ElectroscopeMaterial: Acrylic, MetalUse: To Check Whether The Object Is Charged and Whether The Charge of The Object Is Positive or Negative. Inspecting The Insulation of Objects and Demonstrating Induction Charging, Etc.Application Scenario: Classroom, Laboratory, Physics Experiment TeachingProduct Size: Approx. 11.4 x 10.5 x 7.4cm / 4.5 x 4.1 x 2.9in ( Manual Measurement, Slight Error May Exist ) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List2 x Foil Plate2 x Container2 x Lid