Discharge your Van de Graaff Generator at a comfortable distance. Bring the power of a lightning bolt into your classroom. Heres an easy yet dramatic way to discharge your Van de Graaff Generator in full view of the largest crowd. It is also a safe and handy accessory for the popular hair-raising demonstration. By discharging the collector dome first, you wont shock your demonstrator. Wand contains a 10.5 inch aluminum sphere, polished to a mirror finish, mounted on an 40 cm insulated plastic rod. The flexible ground lead has a banana plug on one end and an alligator clip on the other for attaching to the base of the generator.