I actually saw this one on there too. I am pretty sure the bar spacing is an inch. I've read a lot about it, says its hard to clean and the plastic parts break easily. Full price is like $145ish. It was up for $75...I mean it may be a good deal if you have bigger ratties, but I think smaller ratties will slip through no issue at all. And Im pretty sure you cannot close off the tube parts

Im sad coz I wanted it too but I didn't think for ME at least it was worth the $$ they were asking for it.