PetSafe Large Extreme Weather Pet Door for pets up to 100 lbs. This 3-flap extreme weather system provides optimal protection from the elements, with 3.5 times more energy efficiency than a single-flap pet door. Adjustable and flexible tinted flaps ensure a comfortable passage for your pet, while the paintable plastic frame with a snap-on closing panel allows for easy customization and secure closure. This pet door can be installed in panel doors, wood, storm, PVC, and metal doors ranging from 1-5/8" to 2-1/4", as well as interior and exterior walls. Cut-out measurements are 11-3/8" x 19". Comes with a 1-year limited warranty.