1.porcelain tiles with high strength & hardness 2.lower water absorption 3.size:800cm*800cm 21kgs/piece ... by the following advantage:Wonderful texture,Higher gloss,Higher strength & hardness,Better chemical stability,Lower water absorption,Resistance to pollution,Maintainance ... : more than 110.(5) Proportion: 2.4-2.5.(6) Hardness: 6.0 Mohs.(7) Compressive strength: more than 50Mpa. big ...