These cages are designed for Flat Packing, resulting in compact shipping packages that ensures economical transportation cost. Double layer ABS waste pan, durable and long lasting. Unique connection system; easy to install in both vertical and horizontal directions. Solid divider can be utilized in the middle of both the large cages and between small/medium cages on adjacent small/medium cages. Stainless Steel double locking latch provides security. Plastic dip-in treated grid with narrow spacing for pet comfort and safety.