For quick and simple qualitative demonstration of electrolysis.Comprises stout open-ended glass tube fitted with two tapered carbon electrodes by means of a bored rubber stopper. Connections are made by crocodile clips and an insulating strip of plastic in the bung prevents the clips being shorted accidentally.Glass Tube: (L)74mm x (D)24mm.Collecting Tubes: (L)75mm x (D)10mmRubber Bung size: 21Electrode Dimensions (L)73mm x (D)5mmSpare Glass Tubes are available to purchase separately (B8R07040).