Your heat experiments can be educational and economical. This conductometer compares the conductivities of aluminum, brass, steel, nickel-steel and copper. Five 10cm-long spokes radiate from a 1.9cmdiameter brass hub. Metals are labeled on the hub. Spokes hold ignition solution or wax in notches. Non-conducting wooden handle is mounted on 25cm-long rod attached to the hub. Comes completely assembled. You supply heat source and wax or ignition solution.