Safe and durable: The interior cat door is made of ABS material, wear-resistant and durable. The edges are smooth and burr-free to protect the cat from scratches. Smooth design, paintable materials, perfectly match your door and decoration. Applicable scene: the interior cat door is suitable for all hollow doors, solid doors and interior doors, perfect for laundry rooms , bedrooms, cellars, etc. It will have its own activity space, and your house will smell fresh. Barrier-free door design: there is no one in the house. Put cat food in the house. With the interior cat door, there is no need to worry about the dog entering. The cat can enter and exit freely to play, eat and drink Do not fall: the interior cat door is installed with screws, avoid falling and gaps caused by strip installation, no noise and no problem caused by door locks and door damage Outer size: 27 x 23 x 5.5 cm, through opening: 17.5 x 3.5 cm , suitable for doors thick from 2 to 4.5 cm.