Heat-Conductivity-Bar-Set-RVFM-PH20272-P-A-simple-yet-effective-apparatus-to-demonstrate-the-heat-conductivity-of-various-metals-P-P-Four-metal-bars-copper-aluminium-brass-&-steel-are-mounted-on-a-base-with-a-hanging-hole-Each-metal-bar-has-same-cross-sectional-area-&-its-conductivity-value-is-marked-on-the-back-of-the-base-Sensitive-indicators-that-change-colour-with-temperature-are-attached-to-the-front-of-each-of-the-four-metal-bars-When-the-tips-of-the-bars-are-dipped-in