The washbasin ELENA SOP NERO is made of natural stone and is a product of handicrafts and not of mass industrial production. A key feature of natural stone is the presence of different shades, microorganisms or holes which are not "defects" but part of the naturalness of the product. For this reason each sink is unique and differs in color, shape and size. The sink should be cleaned exclusively with water or with very mild cleaners especially for natural stone based on water. Using strong cleaners can damage the sink in a short time. It is necessary to apply a natural stone maintenance product immediately after the installation of the sink and this application should be repeated periodically depending on its use.