Perfect Pet Soft Flap Cat Door with Telescoping Frame, Small, 5" x 7" Size

Inner telescoping frame that adapts to doors of 1 1/14-inch to 2-inch thickness Tamper proof mounting system, pet door cannot be removed from outside Impact-resisting super-strong thermoplastic clear flap allows pet to see if slide is in place Simple 4-step installation, average install time: 20 minutes) Flap size: 5-inch by 7-inch.Age range description: Kitten