Quick Details: Place of Origin: Spain Brand Name: Silex Blocks Model Number: Manual finishing Type: Silex Block Porosity: Solid Size: On request Color: Grayish Packaging & Delivery: Packaging Detail: Pallets Delivery Detail: 30 days from confirmation Specifications: 1) Good finish 2) Extraordinary hardness 3) Even hardness (8) 4) High content of silica 5) Good value for money Its hardness extraordinara prevents cutting mechanical being and the manual finish the blocks are finished so that the faces are the most perfect as possible to achieve less holes in the joints between them, thus significantly increases the life of the coating. Chemical characteristics (%): Silica: SiO2 98,7 Potassium Oxide: K2O 0.19 Aluminum: Al2O3 0,21 Titanium Oxide: TiO2 0,26 Iron Oxide: Fe2O3 0.24 Magnesium MgO 0,04 Loss on Ignition (1000 ° C) 0.15 Cal: CaO