? CONVENIENT LOCKING --- The button switch is 4-way rotatable, you can easily rotate it into 4 modes with the arrow and icons to control your cat's access options: by yourself, outside, only in and out, completely blocked. ? IMPROVED BRUSH DRAWING WEATHER RESISTANT --- Provides a fixed groove with snap tabs for the weather-resistant brush strip, firmly fixes the brush strip. Even if the brush comes off, it is easy to reinsert it into the fixed housing. It greatly helps the brush reduce noise, stop rain, wind or pest such as mosquitoes as much as possible. ? SCREW DANGERS --- Comes with 2 packs of 8 screws each, one with short screws and the other with long screws. Please screw them on both sides to avoid breakage, not just one side. You can make 8 screws for the 4 screw holes with the long + long, long + short or short + short mounting, depending on the depth of the door/wall to be installed. APPLICABLE FOR --- Inner measurement 15 * 15.5. And the outer size is 19 * 5.5 * 22. It can