They are sectional reptile cages. The two walls inside can be removed to create one, two, or three (as shown) sections. It's make of aluminum and acrylic. The lid is held into place with magnets and removable. It measures 48" long x 12.5" wide x 10" tall. Great cage for nearly any small to medium reptile! If removing only one of the walls you are left with a section that has a surface area of a 20 gallon long and a smaller enclosure for separation or feeding!
I also have a large sectional cage for large reptiles or mammals. Same construction with a few exceptions. It is separated into two sections and the divider can be remove; the floor is a steel removable drawer to allow for easy cleaning and it all measures 36" long x 12.5" wide x 18 1/4" tall. The divider is make of polycarbonate and has holes in it to allow for air to flow easily through the entire cage. The ones i currently use i use for rats but i had a red tail in one before and two ball pythons in another. I have a few extra pieces for these cages as well.

Pictures and further details available at http://cnj.craigslist.org/pet/945704494.html.

Willing to trade for hognose morphs. The unused cages are in New Jersey at my folks old house but i live in Massachusetts. So driving to western MA, western CT (near 87), northern NJ, southern VT, south western NH, or NYC is not a problem for me (Yay for diesel cars).
The sectional reptile cage pictured is one i use where i attatched flexwatt to the bottom (outside) and it heats everything quite nicely. Feel free to let me know if any interest!