Grain size:	less than    0.5mm	Dia75mm  X 750mm
Real density:	more than 1.72g/cm3	Dia75mm  X 1000mm
Porosity:	less than    20%	Dia75mm  X 1524mm
Bending strength:	more than 20Mpa	Dia100mm X 1000mm
Resistance:	less than    7μ Ω m	Dia100mm X 2000mm
Ash:	less than    0.3%	Dia100mm X 2800mm