There are two identical cages available. They are commercially marketed for guinea pigs, but are too small to be used humanely has the primary house. They make great add-ons to larger enclosures though. They can also be used as temporary homes or hospital cages. There are two doors on the top. The cages are each 18" tall x 39" long x 20" wide. Pick up in either Sidney or Royal Oak, depending on the day of the week.