Artec's Voltaic Cell Kit is an educational device that contains three different types of metal plates to learn about ionization. The Voltaic Cell has one brass, zinc, and iron plate to demonstrate the different ionization tendencies of each metal plate. The kit contains a container and a drop-in type lid for easy insertion and removal of plates. Use under the guidance of an appropriate instructor. Voltaic Cell Contents: 1- Container with lid 1- Brass electrode plate 1- Zinc electrode plate 1- Iron electrode plate 1- Instruction manual Artec's line of science educational supplies for classrooms are a great source for STEM (Science, Technology, Engineering, and Mathematics) education and curriculum development for elementary, middle, and high schools.