PetSafe Extreme Weather Pet Door for Dogs and Cats, Energy Efficient - Large

Maximum Energy Efficiency - Unique three flap system is more energy efficient than traditional single flap doors Additional Insulation - Great for hot and cold climates, the center insulated flap helps keep extreme warm and cool air outside of your home Control Your Pets Access - A snap on closing panel keeps your pet from using the door; use a second closing panel (sold separately) for an additional layer of weather protection Match Your Homes Design - The paintable plastic frame allows you to match your doors existing color Do-it-Yourself Installation - Easily fits into standard-size paneled, wood, metal and PVC doors 1 5/8 in - 2 1/4 in thick Sizing - Available in 3 sizes; please see the size chart below to find the best fit for your pet