This levelling system is to properly set flexible, large format, heavy or low thickness tiles. Used for uneven floor foundations or floors that contain imperfections. Tiles will seem uniformly levelled. It also helps speed up the tile setting process. This Tool-co levelling system offer this 3-12 clip suitable for materials with a minimum thickness 3mm and a maximum of 15mm which leaves a joint between the tiles of 1.5mm only. Should a bigger spacing be required, addition tile spacers may be used with this system. All clips have the breaking point very close to the plane where the tiles lay (1.2mm). This means the system can be used without any problems, even on very thin tiles since there remains a gap of 1.8mm for the grout. Packaged in 100 pieces.