About This

• High- quality material and fine craftsmanship, durable and sturdy for a long time.Perfect experimental equipment for explaining the principle of electrostatics.
• The operation is very simple, whether a teacher, a parent or individual students can use it.
• A simple and practical teaching and experiment equipment in middle schools.This instrument is used for real-time transfer of electric charges in middle school physics electrostatics
• interesting and allows students to better understand electrostatics in intuitive demonstrations and interesting experiments.
• The small metal ball is tightened on the bolt of the insulating handle and contacts the end face of the insulating handle. There is no loosening or skewing of the insulation after tightening.