Upgrade your home with added pet freedom using the PetSafe Big Cat Door Glass Installation Adaptor. Specifically designed for glass panel applications, this adaptor kit allows for the easy and secure installation of the PetSafe Big Cat Door (PPA00-17878 or ZPA10-17883) into glass doors or windows—no complicated custom solutions required. Whether you're working with sliding glass doors, patio windows, or fixed glass panels, this adaptor helps you safely mount the pet door without compromising security or energy efficiency. The kit includes everything needed to streamline your installation process, including two mounting adaptor frames, a precision glass cutting template, and all required installation hardware. Designed for durability and versatility, the DIY install pet frame works with most standard glass setups and is recommended for homeowners seeking a functional and visually integrated solution. For those colder seasons, the built-in gasket between the two frames delivers enhanced weather protection. By creating a reliable air seal cat entry point, the adaptor reduces unwanted drafts and supports indoor temperature regulation. This small detail adds up to greater comfort for you and your pets, even when the temperature outside drops.