The individual elements are robust and designed for eternity, the assembly with cable ties if necessary also alone possible. All 8 elements built circular with a diameter of about 2 meters then actually calculates to more than 3,200 liters capacity, but this is in my opinion not very practical. In the illustrated construction of the form are "brimming" only in 1420 (not 1440) liter, ie less than half. Then you can come with the individual dimensions, the construction drawings and geometric basic skills well, rather than 83 cm width of the page elements you would need then in the variant shown approximately 130cm, this is not immediately at the set photo recognizable. To be fair, would have the word "about 3200 liters maximum filling volume in circular structure" loud, or show the photo also this construction variant, the current application I consider misleading. The price-performance ratio, but for me, given the quality, though. I would buy again.