Basically you get what you see, from the product description. Could maybe have been a little bit thicker and more firm, but that's only when really looking for something negative. I've ordered several more of these after my firs order of just a couple to evaluate.

Nice product and a good idea to clip them together into larger pieces.
I will use this as base for the rock work in my tank.
The plates are a little thin and flexible and that is the only downside but overall a great cheap eggcrate