Silica Brick, Lower Porosity Clay Brick with good qualtiy We offer products and ... weight < 20Kg≥MPa35Piece weight ≥ 20Kg30 Technical Data of DN-15 Lower Porosity Clay BrickDescriptionUnitIndexAl2O3≥%42Fe2O3≤%1.5Apparent porosity≤%15Bulk density≥g ... Change1400°C,2h %-0.20.0 BG-96A Silica Brick, Lower Porosity Clay Brick