Its aluminum with narrow width. The very thick gauge makes it a bit heavy. I prefer a lighter pipe guard that is corrugated for strength and therefore weighs less, as these types have never failed me. But if you want a heavy pipe guard on steroids, then this is the one for you. I mean, when I saw it, I seriously thought its was a protector for a 4-stroke pipe, but the picture above suggests otherwise. So its sits in my garage, uninstalled until I find a better use for it, such as cutting it up for use as a side case cover. Thanks for reading.