Super Magnet Cuboid much stronger than expected

The small magnetic cubes are much stronger than expected. If sticking two of which directly successive one gets auseinender the difficulties. Therefore, while providing even plastic discs between the blocks and the one best left well in between.
If you want to build a strong magnet for several blocks, it is even already achieved with the plastic washers in between. 5 square together produce (without plastic discs) a tremendous force!
But be careful, the magnets break very easily when snapped together, but this is normal for such a magnet.