The PetSafe Microchip Cat Door Installation Adaptor is designed for seamless installation into metal or glass doors, windows, or walls. It enhances the performance of the microchip reader when installing the PetSafe Microchip Cat Door into metal doors and provides additional support for window and glass installations. This versatile adapter is compatible with both Microchip and Manual-Locking Cat Flaps, fitting various home setups. It accommodates glass openings from 212 mm to 285 mm in diameter for a secure fit. The adapter features an energy-efficient design with a gasket to help maintain your home's temperature. The comprehensive kit includes all necessary screws, screw plugs, and two installation templates for a hassle-free setup. Since 1998, PetSafe has been dedicated to creating innovative products for safe and healthy pets.