... cognition,judgement and problem-solving during play.Installationeasy to installation,with instructionsFalling height(mm) Age range3-12Capacity15-20Apply toAmusement part, ... Posts or columns:The upright column is made by steel pipe with diameter of 114 mm, thickness of 2.2 mm, quality ... .c,Iron part:The iron part is made of steel pipe with diameter of 60 mm, 48mm, 38mm, 32mm, 28mm, thickness ...