Electric Conductivity. - < 0.5 mS/cm (Dutch 1:1.5 method) pH - 5.8 ~ 6.5 Weight - 5kg ( +/- 5% ) Size / Dimension - 30*30*12 ~ 15cms Aging Period - 6 months Sieve Mesh Size - 6mm and 0.5mm Moisture - Less than 15% Sand percentage - less than 8 % Fiber percentage - less than 8% Expansion Volume - Minimum 15 litres/kg