The bookcase consists of two pillars of ash with brass tip ends. 4mm stainless steel tie rods. Anchoring elements of the rods are in burnished iron with the central rods in polished brass. The shelves are made of safety glass 3 +3 mm.. Shelf supports in ash with polished brass ends. Diagonal reinforcing tie rods for the shelves in polished brass. The base is in steel with the covering panels in ash.