Cat Door Weatherproof Lockable Kitties Puppy Kitten Cat Door for Window [High Quality Material]: This pet door is made of ABS plastic and breathable nylon mesh with smooth surface, withstand thousands of hours of use for a long time, are lightweight and impact resistant. [four lock modes]: 4 cat door modes can be set in 4 ways: locking, only outside, only do inside, do inside and outside (completely open) and without input and without exit (completely locked), easy control of the animal's entrance and exit. [Size]: This cat and dog flap door is designed for both cats and small dogs, with an outer diameter of 29 cm/11,42 inches, an inner diameter of 22 cm/8,66 inches and a thickness of 1 cm/0,39 inches. Pet doors equipped with a silent opening and closing mechanism. [Easy Installation]: This do door closer for small animals is easy to assemble. 8 special nuts provide better fastening and stability. [Wide Applications]: This cute cat door is suitable do interior and exterior doors, walls, windows and cabinets, etc. Specification: Material: ABS Size Chart: Outside diameter: 29 cm/11.42 inch Inner diameter: 22 cm/8.66 inch Thickness: 1 cm/0.39 inch The package includes: 1 pet door with 8 pcs.