Apparent density: 2600 – 2630 kgr/m3 Open porosity: 0.7 – 0.8 % vol. Flexural strength: 8 – 14 MPa Comprehensive strength: 120 – 180 MPa Water absorption: 0.25 – 0.30 % wt. Abrasion resistance: 15 – 25 mm Country of origin: Spain