... filter for water treatment 1.the size can be in 0.1-8mm 2.can be for advance treatment.eg:oil ... .8g/cm3Bulk void volume≥35%≥40%Breakage rate≤0.03%≤0.04%Attrition rate≤2.0%≤3.0%Specific surface area≥1×104 cm2/g ... ~756~1015~222~51~41~51~3 0.5-1mm,1-2mm, 2-3mm,3-5mm,5-6mm,6-8mm,8-9mm ceramic grain filter ...