Specifications Diameter:250-600mm(10" to 24") Length:1500-2100mm Grade:RP RPI HP SHP UHP Nipple:3TPI/4TPI lower resistance, high density Artificial Regular Power dia 300 Graphite Electrode Diameter:250-600mm(10" to 24") Length:1500-2100mm Grade:RP RPI HP SHP UHP Nipple:3TPI/4TPI lower resistance, high density We have full set of production process for graphite electrodes. As one of the most professional graphite electrode manufacturers in China, passed ISO9001:2000 certified.