Check the listing for details. REPLACEMENT FLAP Ideal "ORIGINAL" Plastic Frame Dog Pet Door---**ALL SIZES**. Condition: New. Listed at 29.95 USD. This listing is for all sizes of the Ideal Pet Products replacement flaps for the "Original" pet doors, new and old style. If your door frame is plastic, it's the Original door. If it's made of aluminum it's the Deluxe door sold in another listing. The new style flaps for the Original and Deluxe doors have holes and ridges on the top. The also have a round logo that says Ideal Pet Products stamped on the middle of the flap. The old style Original flap has only holes on the top. It has a rectangle logo stamped on the middle of the flap. All the new style flaps have the round logo stamped on the flap. All the old style flaps have a rectangle logo stamped on the flap.Number of holes on top of flap- Old Style New Style Small 3 3Medium 3 3Large 3 3Ex-Large 4 4Super Large 7 5 No other Ideal Pet Products flaps will fit your door. Ideal makes seven different models of doors and none of the flaps are compatible with each other.