Our door cannot be removed from the outside. There are no screws. The flap is made out of high impact Polycarbonate (Makrolon) which is bullet proof. When locked in place it virtually impenetrable. Extra Large Size For Door Installations – Dual Flap Dog Door Dog Size: Up to 125 lbs. (56kg) Flap Dimensions 14 X 23.5″ – Cutout: 16 1/4 x 25 – Overall: 18 X 26 13/16 Read Dog Door Instructions
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