Stacking rabbit cages are made with galvanized 1x2 14 gauge wire on the sides and top. The floor is 14 ga. 1/2x1 galvanized after wire. The door swings out to the left with the door latch on the right side. Urine guards are standard. Each cage comes with four galvanized legs that lock into the legs of the cage below it. The cages can be stacked up to four high.The trays are made out of 26 gauge galvanized sheet metal. Baby saver wire is optional.