Classify each of the following as a conductor or insulator: steel, copper, rubber, wood, cardboard, aluminum
Steel: Conductor
Copper: Conductor
Rubber: Insulator
Wood: Insulator
Cardboard: Insulator
Aluminum: Conductor
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Classify each of the following as a conductor or insulator: steel, copper, rubber, wood, cardboard, aluminum
### Input: 
### Response: Steel: Conductor
Copper: Conductor
Rubber: Insulator
Wood: Insulator
Cardboard: Insulator
Aluminum: Conductor