The metal kenzan is the traditional kenzan. It is made of brass needles and a lead base. Lead is used as the base because it is a heavy metal, and the weight helps to balance the arrangement. Lead is not absorbed through the skin, nor can it move from water into skin. It enters the human body through ingestion or inhalation. Therefore handling lead is safe, however we recommend you take precautions such as: washing your hands after each use, especially before eating food; not allowing children to handle the kenzan; and not placing the kenzan in the dishwasher. We recognize that some customers may be concerned about having a lead product in their home. For these customers we offer the resin kenzan. The resin kenzan comes with a suction mat. The mat is suctioned to the vase, and the resin kenzan is placed on top of the mat to secure it in place.