20 Questions

Are you in your natural state, or manufactured?

Originally posted by Suzianne
Not all zippers are metal.

They are where the material is heavy enough to support them (like denim), but they're made of lighter materials (often plastic or nylon) more often when using lighter materials, such as a pillowcase, or a dress.

Are you bigger than a microwave oven?

Are you a microwave oven?

The post that was quoted here has been removed

Are you something normally used in domestic (home) situations?

Would I find you inside a factory?

You'd already said (implied anyway) that in Answer No.2. My badly worded question should have said "are you used in a factory?" e.g. factory machinery.
8. Are you useful or just ornamental?