Rates of melting compared by placing wax on the ends of the different rods thus demonstrates rates of conductivity in the different metals.
Five rods, one each of aluminium, copper, brass, zinc and iron, embedded along one side of a metal tank, size 150 x 90 x 100mm.

Physics School Lab Equipment Suppliers in India 

Ltekonline are the manufacturers of Conductivity Apparatus Heat Lab used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Physics Lab Experiments for Engineering Teaching Lab in Universities