This "Pan Seal" It will fit the model listed below: Williams Sonoma Automatic Bread & Dough Maker Model: WS0401 To confirm that this Pan Seal (O-Ring) does in fact fit all this model we have tested the part in each different model bread machine that we have in our warehouse. This test is done by placing the part on each individual model bread machine. We now have bread machine parts available for the following brands: Let us know the model number of your bread machine and we will let you know if we have the part you need for your bread machine.                                                                                          If you have any questions please ask before you "Buy". THANK YOU!