Electrolysis Cell Spares. For quick demonstration of electrolysis. Comprises open-ended glass tube fitted with two carbon electrodes by means of a rubber stopper. Connections made by crocodile clips and an insulating strip of plastic in the bung prevents the clips being shorted accidentally. Consists of glass tubes of Dia 74 x 24mm, and collecting tubes of Dia 75 x 10mm. Spare collecting tube.