Ceramic Mosa tiles were used in the central hall and in the west and east wings of the Cuypers building, in the tunnels (including the Middentunnel), and on the custom-designed stairs that lead to the platforms. The comprehensive Mosa solution is characterized by the custom design by Merk X and also by the size of the tiles (16 x 48 inch and 40 x 40 inch), the unique micro-relief tiles that provide high-grip and low maintenance, the guidance system for the blind and visually impaired, and the weathered ochre and grey colors. The Mosa tiles were used on a surface area of more than 161,464 sqf .