Conductivity Star-EIS-PH0377CS offers a thoughtfully designed, durable resource for hands-on learning. Consists of a support rod with a metal disc on top on which are fixed the four metal bars. To demonstrate the different thermal conductivities of different metals - copper, brass, aluminium and iron. This apparatus consists of a support rod with a metal disc on top on which are fixed the four metal bars. Heating the metal disc the heat conducts along the bars.