The Avantgarde Vario-Line wall system is made of concrete and, in addition to regular bricks, comprises a newly developed transition flagstone that offers versatile possibilities. Thanks to an easy-to-use tongue and groove system, it can be fully integrated into the wall. As a lawn edging stone, it creates a harmonious transition between wall and lawn or flower bed, facilitating lawn care since the lawn edges do not have to be trimmed. The transition flagstone is also suitable as a slope reinforcement.