Van De Graaff Generator Hand Driven Working Model for Teaching Purpose. Hand operated, mounted on a base this Van de Graff Generator has a metal sphere surrounding the upper pulley assembly and the charge accumulates on the sphere which is supported on an insulated transparent plastic column that also supports the pulley assembly at its upper end. The charge builds up until electrical breakdown of air surrounding the sphere occurs. Supplied with discharging sphere, metalized spheres, Faradays pail, head of hair, point discharge, electrical whirl and neon bulb this item comes with an excellent quality. The item "Van de Graaff Graff Generator Working Model Educational Physics Electrostatic" is in sale since Monday, October 17, 2016.This item is in the category "Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Other Lab Equipment". The seller is "soultrends23" and is located in CHANDIGARH, CHANDIGARH. This item can be shipped worldwide.