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External dimensions lxwxh=110x60x110cm. Opening in top 52x32.5cm. Buffer volume 93 l/m. Infiltration area 0.28m2 per side per meter. Minimum infiltration capacity 390 l/h. Strength class > 400kN (tested according to EN1433). Equipped with water-permeable porous concrete paving stones 20x20cm in the walls. Weight 789kg. Concrete strength C60/75. Environmental class EE3. 1x PVC connection 160mm, 1x PVC connection 160mm for down pipe/overflow (optional).