With the BLACK BOX the outside mirrors and mirror strips were replaced by black mirror, in other words, black glass that has been silvered.
For your information: black mirror is nicer and classier than black glass but also more expensive!! Just like with the classical BOX, all the outside mirror pieces are fully beveled. At the inside normal clear mirror glass was used without beveling.
All mirror pieces are glued on a MDF support, so that these small pieces of furniture are very strong and can carry a lot of weight.
Also here, the bottom side is provided with protective feet to lift the cube or pillar 2 cm from the ground and avoid damages.