This is the replacement flap and the surrounding plastic frame for the Ideal pet door that comes in the Ideal Fast Fit and Ideal Fast Sash pet doors. Ideal dog door replacement flaps are available separately if your plastic frame is still in good shape. There is an old and a new style, and you need to get the right one as they do not interchange. The new style has a round logo in the flap a few inches from the top. The older style usually says "Made in USA" right on the flap and has the size printed right on it.