Simple installation steps: This can be done on wooden or PVC doors. Adapters required for brick walls, glass and patio doors Adapts to various climatic conditions: thanks to its weather-resistant strip and its double function Improved automatic lock, wind or heat stay out Offer greater freedom to your dog or cat: this allows you to offer maximum freedom to your dog or cat; it is an ideal solution for letting cats and dogs into your home without having to open the door frequently. Your pet will be more independent Simple and practical locking: in addition to being easy to install, this door also allows you to offer maximum freedom to your dog or cat . Resistance: this cat flap is robust and durable, thanks to its hard transparent plastic blade and its high quality durable plastic frame; the door is suitable for most standard walls and doors There are four modes (1) Close the door lock the cat flap in both directions. (2) means the door opens in both directions. (3) Allow cats out, but don't let cats in. (4) Entry is allowed but not exit. [Product material]: ABS [Product color]: black Shop Tips: 1. The size is measured manually, please allow the error (1-3 cm). 2. Due to different monitor pixels, there may be color difference, please refer to the actual product. Sold by grid cool store