The bookcases can stand freely with up to 2 boxes - with and without a base. When using more than 2 boxes on the shelf, the individual bookcase must be mounted in the wall. For wall mounting use the pre-drilled holes in the back cover and screw with screw plug that fits the given wall. The bookcase is made of lacquered oak. The wood used is FSC certified from European forests. As wood is a natural material, nuance differences can occur even on the individual furniture.