<p>The box has a clamp locking a partition wall between two lugs (6) of a plastic material body and the clamp. The clamp has a position retracted inside the body and a position leaving the exterior of the body. The lugs of the body project towards the exterior and are disposed at an end of a lateral wall (3) that is opposite to the bottom (4) of the body. Each lug is curved towards a lateral wall in the absence of an external stress and is adapted to flatten against an outer surface of a partition wall. The box is displaced with respect to the surface.</p>
