Babilonia is a freestanding metal bookcase.Frame: Black phosphatized sheet steel / Embossed whiteCharacteristics and maintenance instructions:BIG IRONY products have intentionally not been painted because it is the surface irregularity the characteristic which makes them so special. The daily use will form stains forming a patina which renders the surface even more beautiful. To clean it use a non aggressive/soft detergent as it would be wood.