This is the PetSafe CD10-050-11 locking flap door, designed for cat owners who are looking to provide their pets with secure indoor access. It is easy to install, and its dimensions are 6 1/8" W x 8 7/8" H. The door only weighs 1 lb, making it super lightweight and convenient for both pets and their owners. The door comes with a slide lock system that is easy to use, and it is made of durable plastic that can withstand frequent use.