SOLID ALUMINUM FRAMEAluminum dog door double flaps inner frame 125 x 87inch and strong magnetics ensure maximum security for the home and tight seal flaps of ruff weather dog door with a short brush would keep dust away easily SAVING ENERGYSECURITYWeatherproof function of the dog door in the wall is achieved by a magnetic closure and UVresistant flap A locking panel is included in a dog door which can not only double protect the security of the home but also reduce heat transfer in rough weather MAXIMUM FREEDOM FOR PETSAluminum dog door gives your pets the independence to go outside on their own and simplify your life as a pet parent Our dog door comes with a slidein panel and a locking system that would help you always stay in control EASY DIY INSTALLATIONEasy installation under the help of MAVRICFLEX aluminum dog door detailed instructions even for the most nonhandy person LIFETIME GUARANTEECustomer satisfaction has always been our top priority MAVRICFLEX offers lifetime free customer service We will replace missing parts or broken parts of the aluminum dog doors caused by the manufacturer at no charge on your side