... , RPI, HP, UHP used for arc furnaces Graphite Electrodes:-grade:RP, RPI(HD), HP, UHP-dia. 75-600mm; length:500- ... : 3TPI, 4TPI, 4TPI long;-high conductivity-high bulk density-low electrical resistance-low ash-good resistant of oxidation,heat shock & impact-competitve ... .20.3*male-female graphite electrodes: we can produce other grade also according to customer’s requirements.*we can produce to ...