PET DOOR DELUXE LARGE ANODIZED(WHITE) 11 1/2 X 16 7/8 INCH FLAP SIZE FOR PETS. OVERALL SIZE IS 15 1/2 X 19 3/4 INCHES. This pet door is made in the USA with heavy duty, aluminum extrusions for extra strength. Both U-Frame and Panel are made with improved, high quality rubber for durability, superior weather sealing, and needed flexibility for pet safety. The rubber assembly(panel&u-frame) have implanted magnets and magnet keepers to insure precision of seal. In addition, for further safety to larger dogs, a split in the u-frame on this model allows it to release if jammed. Pride makes the very best pet door in the world and unlike its competitors does not use plastics. Their rubber does not freeze or crack due to cold weather, nor go soft, become sticky and smell or warp in summer temperatures. Superior materials ensures longer, trouble free service.