Realstone_Slate XT20 is produced in the thickness of 20 mm in the two 50x100 and 80x100 cm sizes and in the Shell, Iron, Musk and Black colours, with a large assortment of trims. In the extra-thick 20 mm variant, Realstone_Slate is also ideal for dry installation on gravel, grass and sand, for raised floorings and for use on driveways.