Convenient Lock: the pet door knob style switch is 4 way rotary, you can easily rotate it to 4 modes with the arrow and icons to control your cat's access options: in only, out only, in and out freely, totally locked Quality Material: the pet door is made of quality plastic material, the surface is sturdy and durable, not easy to deform and wear, supporting for a long time use; The cat door outer frame has slot, which can fix on the doors, when the brush strip accidentally falls off, you can easily fix it back to the slot, easy to operate Applicable for: the size of weatherproof pet door is approx. 8 x 8.6 x 1.2 inches, and the pet flap door is designed with slots, it's suitable for cat with waist circumference shorter than 15.75 inches /40 cm, it fits to being installed to interior doors, exterior doors, windows, cupboards, glass, etc. Easy to Install: for pet door detailed installation steps, please refer to the installation steps on the package and display it in a conspicuous place to save your precious time; Take care of notice and prepare necessary tools, easy to install as you need; The tunnel depth could be cut down according to your installation need Wide Application: the cats dog pet door fits on pet carrier, glass door, interior doors, steel door, security door and window, cupboards and so on Features: The 4-way locking cat flap makes it easy for cats to get in and out of the house, and you don't have to open the door for them all the time to exercise their skills. The door with cat flap comes in 4 different modes for you to choose from, ensuring your cat doesn't mess up at night. Specifications: Material: plastic Color: white Size: approx. 8 x 8.6 x 1.2 inches (outer size) Package includes: 1 X Dog flap door Note: Manual measurement, please allow slight errors in size. The color may exist slight difference due to different screen displays.