Pattern Name: Dual Flap |Size: Medium eXtreme Performance Medium (Dual Flap) Stainless Door Mounted Dog Door - Energy Efficient and Secure and GUARANTEED FOR 5 YEARS Designed for installation into any standard exterior household door, these Door Mount Pet Doors can be used on doors made of wood, fiberglass, steel and glass. eXtreme dog doors are designed to last a lifetime. To prove this, eac... #doggates