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Develop your own lightning with these time-tested products that have delighted pupils for a long time! Named right after the inventer Van de Graaff, an American physicist, this device generates reduced-amperage static electrical energy that can be "stunning" but flawlessly protected. Two diverse pulleys inside a plastic column create and carry static cost up to the polished alumimun collector world. You can attract out this static cost in a burst of lightning - or you can established every single hair on your head on finish! Our instruction booklet tells you how to raise hair make lightning and electrical wind experiment with St. Elmo's fire or electrostatic attraction and repulsion. Technical specs: ? two hundred,000 volt prospective, sparks to five" ? 45 cm higher, 2 neoprene belts ? 18 cm (seven") dia oblate (.040 thick) ? Operates in humidity up to 90% ? 1 three/four"dia opaque PVC column