The polygonal block encloses paths, flowerbeds etc. It is made of plastics, with a hollow rectangular cross-section. It can incorporate transverse ribs (3) at intervals in the vertical direction. Connectors can be provided, fitting inside the blocks but extending for only part of their length. Alternatively end plates, with the same outline as the blocks, can be similarly fitted in them. USE/ADVANTAGE - Light weight, easily laid, and unaffected by frost.