A small but powerful Van de Graaff generator. Generates potentials as high as 200 kV and sparks up to 5”. Operates in humidity up to 90%. Fully assembled or in an easy to assemble kit. The unit, about 45 cm height with 18 cm diameter aluminum dome, has a ground terminal for discharge electrode (not included). 1-3/4″ diameter opaque PVC column. Include one replacement neoprene belt and 16-page experiment book. Replacement belt is 25″ in circumference. Color may vary.