Simple installation steps: it 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 weatherproof band and its improved automatic double locking function, wind or heat stay out Give your dog or cat greater freedom: this allows you to provide maximum freedom for your dog or cat; its 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 pet door is sturdy and durable, thanks to its hard transparent plastic blade and high quality durable plastic frame; door fits most standard walls and doors