Graphite Petroleum Coke, Graphite Electrode Powder, Isostatic Pressing Graphite manufacturer / supplier in China, offering Hot Sell Graphite Petroleum Coke GPC 1-3 1-5mm Used as a Carburizer, Artificial Graphite/GPC Size: 0-0.2 0.2-1 1-5mm Used in Casting Industry, Low Sulfur 0.05% High Carbon98.5% Graphite Petroleum Coke for Steel Factory and so on.