Ideal Pet Products Designer Series Ruff-Weather Pet Door with Telescoping Frame, Extra Large, 9.75" x 17" Flap Size

Crafted from sturdy structural foam plastic, this frame fits doors with a thickness of 3/4" to 1-3/4". Optional wall kit sold separately | Equipped with two flexible vinyl flaps, forming a 3-inch barrier for superior insulation and energy savings | Flap size is 9.75" x 17", frame size is 13.9375" x 21.625", and pet door cutout size is 11.512" x 19.25" | Comes with a lock-out slide to keep your pet in or out | Installs easily and securely. Package includes all necessary components: mounting hardware, a template, and straightforward instructions