Replacement door flap for the Classic Pet Door, Deluxe Patio Panel Door, Wall Entry Aluminum Pet Door™ (old model), and Larson Storm with Classic Pet Door (old model)._x000D_ _x000D_ The Wall Entry Aluminum Pet Door uses 2 flaps on either side of the tunnel for extra energy efficiency. One flap is in the inner opening and one is for the outer opening. You can replace the flaps separately.