Looks like brushed stainless steel. I love the red one, but the orange one was much too pastel to show the design. So, I used an orange permanent marker and colored over the pattern (took a while), but it is gorgeous now.
The metal hanger on the back makes the art stick out from the wall too far, and is ugly from the side view. So, I flattened out the protruding hangers (easy to do). Now they look awesome from my "tweeking". I also hung mine upsidedown, which I like better.Great deal on sale.