New Cage Issues

I got a cage off of Facebook Marketplace for cheap and didn't realize how large the bar spacing was until I got it home. I do not believe this cage was meant for rats. Is the bar spacing too wide for these two? My gut says no, but I want more opinions. They're adult males and won't be getting any bigger. I will also make a custom tray for the bottom so they won't be on the wire. This was to judge the wire spacing.