ZrO2(%) 65 Apparent Porosity(%) 16 Bulk Density(g/cm3) 3.85 Cold Crushing Strength(MPa) 150 Refractoriness under load(T2) 1710 The products adopt isopress synthetic materials, so, , the spall resistance is better than normal Zircon brick. Widely used for superstructure, such as Tuck-Stone bricks, Peep Holes bricks, Arch bricks, etc. Of all kind of glass furnace.