The little round thing! Big Jim 125 fits almost any free wall space and doesn't require much room height. Very decorative, in the style of the Big Jim 175, it features four larger central compartments. The plug-in system, combined with metal latches, provides a positive, tool-free locking mechanism. Assembly is very simple and hassle-free. Also important: screws and dowels for standard masonry, detailed assembly instructions, and a drilling template are included with the shelf! Big Jim can also be installed on plasterboard or wooden walls. Please just ask if you need them so we can determine the correct mounting hardware. MDF dyed throughout, 16 mm thick with a semi-gloss, waxed finish in anthracite or concrete gray. The MDF (medium-density fiberboard) we use is called "engineered colored wood" for a reason. It is a wood fiberboard dyed with organic dyes, manufactured in the EU from completely non-toxic materials, and offers a unique look and feel.