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)10mm. Rubber Bung size: 21. Spare Glass Tubes are available to purchase separately (B8R07040).