A friend of mine calls me last night and wants some advice on new board racks. We are looking at the ad and it appears to be made in China with 6016 aluminum. I know nothing about the different grades of aluminum but the type I see mentioned most often is 6061 not 6016. Is the 6016 an inferior product that could break, rust, warp, etc.? In layman's terms how much of a difference is there between these products?

Thanks.