Feature: 1. SAFETY MATERIAL: Cat door is made of ABS material, wear resistant and durable, with flat edges and no burrs to defend cats from scratching. 2. BARRIER FREE DOOR DESIGN: You put the cat food in the house, the cat can come back home to eat and drink after free to go out to play and refuse the dog to come in. 3. AUTO CLOSING WINDOW: Cat Interior door has the function of auto closing window, which can close by itself after the pet leaves, convenient and safe. 4. SCREW INSTALLATION: Cat door uses screws to install, avoiding peeling and gap caused by tape installation, no noise and trouble caused by door damage. 5. APPLICABLE OBJECTS: Pet door fits all standard interior doors, suitable for any solid or hollow interior doors (most cat holes are not suitable for hollow doors). Install in garages to defend homeless pets on cold nights. Specification: Item Type: Cat Door Material: ABS. Package List: 1 x Cat Door1 x Frame1 x Instruction Manual8 x Short Screws8 x Long Screws8 x Screw Hole Cap2 x Open Hole Fixed Double Sided Adhesive Note: The inner groove can be cut according to the thickness of the door, cat doors can be installed regardless of the thickness of the thin