Grain size:	less than    0.5mm	Dia50mm  X 1000mm
Real density:	more than 1.72g/cm3	Dia65mm  X 1000mm/1300mm
Porosity:	less than    20%	Dia75mm  X 762mm/1200mm//1524mm
Bending strength:	more than 20Mpa	Dia100mm X 1016mm/1320mm
Resistance:	less than    7μ Ω m	Dia100mm X 1600mm/2032mm
Ash:	less than    0.3%	Dia110mm X 1350mm/1600mm