I have found the only way to get the good coated wire that has the proper bar spacing is through a fence supply company but then you are going to have to buy a whole roll.
Not cheap... but at least you will never have to buy wire ever again.
Some people can find the coated hardware cloth at Home Depot or Lowe's or a place like that. All I could find was galvanized, so I had to use that. I put it on the outside of the cage so hopefully it won't get as icky as fast.
A forum community dedicated to Rat owners and enthusiasts. Come join the discussion about breeds, health, behavior, housing, adopting, care, classifieds, and more!