... Product Model:0.5-2mm, 2-4mm, 3-5mm, 4-6mm, 6-8mm, we are able to produce other specification according ... shape, Gray color or black, rough and porosityApparent density1.4-1.6g/cm³Bulk Density0.9-1.1g/cm³ ... Porosity≥36%BET≥4*104cm2/gHydrochloric acid soluble rate<2%Wear rate<2 ... .2%Crushing strength>4.0MpaLOI<0.15%Water ullage<150mm/m (filtering speed ...