Richell Pet Training Crate With Double Door And Lockable casters - Large Type: Gates & Extensions Material: Locking system on door, top & base for extra pet security. Lockable casters provide easy mobility. Slots in base hold training pads securely in place. Two storage trays on top hold toys, leashes, etc. Removable tops and base make it easy to clean. Color: Multi-Color Color Mapping: Multi-Color