| Material | Physical property |
|---|---|
| Iron and steel | Hard, strong |
| Plastic (PVC) | Low density, strong, resistance to rust |
| Gold, platinum and silver | Shiny, unreactive |
| Aluminium | Good conductor of heat, low density |


| Material | Physical property |
|---|---|
| Iron and steel | Hard, strong |
| Plastic (PVC) | Low density, strong, resistance to rust |
| Gold, platinum and silver | Shiny, unreactive |
| Aluminium | Good conductor of heat, low density |
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