Solid carbon Electrode 100 x 20 x 5mm (3.93" x 0.78" x 0.19") Single Electrode Used For students electrochemical experiments - Can be used with Eisco labs PH0927N8 Student Voltaic Cell & Porous Cup Replacement electrode for use in a voltaic cell Solid carbon Electrodes. 100 x 20 x 5mm (3.93" x 0.78" x 0.19"). Used For students electrochemical experiments - Can be used with Eisco labs PH0927N8 Student Voltaic Cell & Porous Cup. Replacement electrode for use in a voltaic cell