RUBI CYCLONE LEVEL SYSTEM avoids the generation of lippage during the installation of ceramic tiles, from 3 to 20mm thick, both during floor and wall tiling. Easy and intuitive use. No additional tools required for installation. Utilises an impact removal system. ALWAYS in the direction of the grout. Although they can also be used in smaller formats, they are recommended for tiles 30 x 30cm (12 x 12in) and always with double glueing.