1. [4 Way Locking Mode] - Our Interior Exterior Cat Door could be adjusted by the rotary lock with tabs to 4 modes: out only, in only, both in and out, and fully locked, easy control of your pet's in and out. 2. [Size & Application] - Outer Size 7.56" x 2.17" x 8.46"(W x H x D), Inner size:6.18" x6.30"(W x H), suitable for installation on doors and thin walls, suitable for cat lighter than 15.7 lbs. 3. [] - Made of ABS material, weather-resistant, the surface is smooth and durable. It provides a fixed groove with Magnet for weather-proof brush strip, firmly fix the brush strip. Even if the brush strip comes off, easy to put it back into the fixed groove. This greatly help the brush strip reduce noise, stop rain drop, wind or pest like mosquito to the most. 4. [Easy to Install] - Step by step installation instruction in the instruction manual included in s box and installation presentation video for you reference, take care of notice and prepare necessary tools, easy to install as your need. The tunnel depth could be cut down according to your installation need. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.