A number of elongate objects (4, 4 min , 5), tapering from their bases, are enclosed in a box-like unit. A first number of such objects (4, 4 min ) are disposed with their bases (4a, 4a min ) at the first end wall (1a) of the unit, and a second number of objects (5) are disposed with their bases (5a) at the second end wall (1b) of the unit. The objects are disposed in parallel relationship and the first objects have their noses disposed at the bases of the second objects, and vice versa. The first objects (4, 4 min ) are disposed in cases (6, 7) which each display, at their first end (6a, 7a) a cylindrical configuration, and at their other end (6b, 7b) display a four-pointed stellar configuration, and a smooth transition adhering to the tapering of the objects between cylindrical and stellar configuration. Each respective object is disposed in its associated case with its base at the cylindrical, first end and its nose at the four-pointed, stellar end. The second number of objects (5) extends between the cases and supports against their outsides.
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