Unfortunately, I was disappointed with these shelves.  They have a very strong chemical smell and they still felt a little wet to the touch when I received them.  I've had them outside for 5 days and the smell is still strong enough that I still can't bring them in to install.  The overall finishing is rushed - all the nail heads are visible through the stain - something that wouldn't take that long to do and would improve the overall quality.  I'll keep and try to reinvent or improve myself because returning is a pain.  I have emailed the folks that made them to ask what product they used to stain so hopefully they will shed some light on this.