A chain link fence. This model has 8 fence segments, as seen in the last thumbnail. There are no materials or textures, just add a metal (or whatever fits your scene) material.
Put it in any outdoor scene to add extra detail. This model can easily be wrapped around a curve to fit your 'non-straight' needs.
The models come in three separate files for the three components: The wire, the horizontal pole, and the vertical pole. The only exception is the .blend file, in which all three components are separate objects.