... , fluxing/degassing tubes, molds, crucibles, special structural parts ProductionRaw material: high quality petroleum coke.Extruded, baked, impregnated and graphitized under precise technical ... resistance to thermal shockProper electrical conductivityMinimum wettability to molten metals and glass Typical SizesDiameter (mm) 35,40,45,50,60,75,100 ...