01 Knob-type door lock: A good measure for cats who have pry open the cage. Easy to open and close just by pinching the lock, so you can rest assured that your cat will not be able to open inside. 02. Wide door for easy insertion and removal. Doors on all levels, making it convenient to put and take out your cats and other items. In addition, the wide door is 14.2 inches (36 cm) wide x 18.9 inches (48 cm) tall so you can easily install the toilet. 03. Relaxing with a wide shelf. Load Capacity: Approx. 17.6 lbs (8 kg). Comes with a spacious shelf that allows cats to relax in. It is large enough to hold cat beds and toys on the shelf. It is also very easy to remove the shelf from the cage and easy to clean. 04. Comes with a ladder that is easy to climb and descend, and it is easy to use even for kittens and senior cats, and can be set up freely in your preferred position. 05 Freely Assembled: You can freely mix and match, so you can create a castle with Nyanko. The stages are freely assembled, so it can be used as a single or two-tiered type. When one kitten grows bigger and more families, you can create a new cat, and when the family grows, they can be arranged in 2 tiers and further 3 tiers to create a fun arrangement. 06 Rust Resistant Epoxy Paint with excellent corrosion resistance and abrasion resistance, so you can use it for a long time. Includes 07 cat doors: Comes with a cat door that allows you to freely enter and exit, making the cage a place to relax. It can also be locked from outside depending on the owner's convenience. You can enter and exit the mode between the ON and off, but you cannot leave it out. Can not be moved in or out of the way; Comes with casters that are convenient to move 08. Comes with 6 casters in total, making it easy to move around when cleaning. The 3 cups are equipped with a stopper, so the cage can be locked in place when using.