Dissectable, durable, holds a charge for hours! Constructed of a new dielectric plastic. This 473ml volume Leyden Jar demonstrates that a charge is stored in the dielectric (insulator) and not in metal surfaces. Consists of 2 aluminum conductors, one inner and one outer, polystyrene dielectric jar which fits snugly between aluminum charge rod with electrode ball which screws onto inner conductor. Instruments and suggested procedures are included.