Presto 09909 Pressure Cooker Canner Gasket Sealing Ring & Auto Air Vent Genuine Presto 09909 Pressure Cooker / Canner Sealing Ring with Auto Air Vent The Sealing Ring Fits Around The Inside Rim of The Cover And Forms A Pressure- tight Seal Between The Cover And The Body of The Pressure Canner During Canning And Cooking. Fits Models: PCC4 (A403) PCCT4 (A403AT) PCD4 (A403AD) PCD4A (A412) PCC4A (A411) PCC4H (A410) PCE4 (KEO2) 40 103 104 204 404 A401