The gaps look far too big for a hamster! The listing claims it's made of pine, but doesn't say if it's treated or not. Generally, I wouldn't recommend pine as pine shavings are toxic to hamsters. I would only ever get solid floor shelves. As Amity and Drago have said it would be better to make your own shelves.
If DIY really isn't as option,
these Ikea magazine racks work. You just have to remove one side of the rack (can be yanked off) and block up the holes. I have these for Jasper and they work perfectly.