* Copper: Widely used in electrical wiring due to its excellent conductivity and affordability.
* Aluminum: Another common conductor in wiring, particularly for overhead power lines because it's lighter than copper.
* Gold: Used in electronics for its resistance to corrosion and excellent conductivity.
* Silver: Has the highest electrical conductivity of all metals, but is expensive.
* Brass: An alloy of copper and zinc, often used for electrical contacts due to its strength and conductivity.
* Iron: Used in many applications, but not as efficient a conductor as copper or aluminum.
To provide you with four specific metallic conductors, please tell me what criteria you're looking for. Are you looking for:
* The most common conductors used in everyday life?
* Conductors with specific properties like high resistance or high conductivity?
* Conductors with specific applications in a certain industry?
Once I know what you're looking for, I can provide a more relevant answer.