National Presto Ind 09909 Cooker Sealing Ring with Automatic Vent
Pressure Cooker Sealing Ring With Automatic Air Vent, For 3 & 4 QT Cast Aluminum Models Inc. PCC4 (A403), PCCT4 (A403AT), PCD4 (A403AD), PCD4A (A412), PCC4A (A411) PCC4H (A410), PCE4 (KEO2), Also Earlier Models 40, 103, 104, 204, 404, A401.