What tubs are those Deb?

I know Connie has been hassling you for the magic answer for wheel + rack= easy and less chew out risk.

They look deeper than the litter pans, and I think those would be potentially better for rats or ASF's (what are the dimensions?). I like giving the rats as much height as possibel, without sacrificing the utility of the rack, and the extra heigh for a wheel would be great for ASF's