Description:The Perf boxes are a permanent item at the SFMoMA. The design highlights the natural organic appeal of the wood and has a modern design vibrancy. The Perf box 3 High in Birch stack and rotate independently, free from hardware, and held in place by gravity. The strong casters give it mobility and flexibility. They are very well-made and a flexible storage solution as a bookcase, holding LPs, CDs/DVDs, Books, etc. Good for a home office too.The modern stacking Perf boxes are made from beautiful Baltic birch. It is thick and sturdy and the process of thin-ply gives a nice revealed edge. The precise joinery of the corners give it a nice modern architectural appeal - simple, yet organically beautiful wood. The quality and craftsmanship really stands out for this basic and versatile narrow bookcase.Materials:Baltic Birch thinply, castersDimensions:Perf Boxes 3 Stack: 13" d x 13" w x 49" h