A simple type of Electrolysis Apparatus, but demonstrates the principle as efficiently as other expensive appartus. Consists of a plastic container 3" dia x 2.5" ht, total height 3.75", with mounted carbon electrodes. The bottom of the container has cut outs so that leads can be connected to the electrodes with ease. Supplied complete with two alligator clip leads ( 1 red, 1 Black), two graduated test tubes and instruction manual. Works on 12v dc.