Endura Flap Pet Door - Double Flap Door Mount, Sturdy Aluminum Frame All weather single or double flap versions available for outstanding energy efficiency and maximum wind resistance from moderate to the most extreme climates Excellent design that is flexible and safe. It is insulated, durable and has an environmentally friendly flap with adjustable magnet strength makes training simple White heavy gauge aluminum framing suitable for quick and easy installation into solid, metal, or hollow core people doors and storm doors Includes a sturdy security locking cover to close off access when not in use Made in USA