IDEAL PET PRODUCTS SINCE 1979 Perfect Pet Soft Flap Cat Door with Telescoping Frame, Medium, 7" x 11.25" Flap Size

Inner telescoping frame that adapts to doors of 1-1/4" to 2" thickness | Has a tamper proof mounting system so the pet door cannot be removed from outside, and an impact-resisting super-strong thermoplastic clear flap that allows pet to see if slide is in place | Pet door measures 14.88" x 2.13" x 8.94" | Flap size: 7" x 11.25" | Simple 4-step installation: All parts and instructions included. Average install time is 20 minutes