ILLUSTRATED INSTRUCTIONS: We have illustrated instructions to guide you through the assembly, and all matching hardware is included. The surface of the pet house is smooth for easy cleaning; a wet cloth will do the job. SEVEN AIR VENTS: To ensure the table interior has good ventilation, we add seven air vents on the back panel of the pet side table. With the front door and back air vents, the pet bathroom will be less frowsty. INDOOR PET CRATE: This is not only a good way to conceal a cat’s litter box, but also a piece of neutral modern home furniture. Make pet supplies go well with any other home furniture in your house, suitable for the living room, hallway, bathroom, laundry room, etc.