When too much weight is stored in these sorting bins of the “Action” store, the walls are pushed outwards and the bins collapse. This even stiffer stiffener, prevents the bins to collapse; shown as the orange stiffener between the top 2 bins. An older design (printed in black) where less stiff and tended too bend a little, which is less esthetic, hence this updated version.

One of the photos show that the older design bends under high load, it works, as the sides are pulled closer, but the new design is more stiff and looks better.