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 cooker during cooking. Compatible Products 01/PCC4 - 4-Quart Cast Aluminum Pressure Cooker 01/PCC4A - 4-Quart Cast Aluminum Pressure Cooker 01/PCC4D - 4-Quart Cast Aluminum Pressure Cooker 01/PCC4H - 4-Quart Cast Aluminum Pressure Cooker 01/PCD4 - 4-Quart Pressure Cooker 01/PCD4H - 4-Quart Pressure Cooker 01/PCE4 - 4-Quart Pressure Cooker 01/PCE4A - 4-Quart Pressure Cooker 01/PCE4H - 4-Quart Pressure Cooker 103 - 3-Quart Pressure Cooker 104 - 4-Quart Pressure Cooker 204 - 4-Quart Pressure Cooker 40 (2.5qt) - 2.5 Quart Pressure Cooker 40 (4 qt) - 4-Quart Pressure Cooker 403 - 3-quart Pressure Cooker 404 - 4-quart Pressure Cooker A401A - 4-quart Pressure Cooker A403A - 4-quart Pressure Cooker A403AD - 4-quart Pressure Cooker A403AT - 4-quart Pressure Cooker A409 - 4-quart Pressure Cooker A410A - 4-quart Pressure Cooker A411A - 4-quart Pressure Cooker A412A - 4-quart Pressure Cooker A413A - 4-quart Pressure Cooker A414A - 4-quart Pressure Cooker A415A - 4-quart Pressure Cooker A416A - 4-quart Pressure Cooker KE02A - 4-quart Pressure Cooker KE02AT - 4-quart Pressure Cooker PB01A - 4-quart Pressure Cooker PB05A - 4-quart Pressure Cooker PB07A - 4-quart Pressure Cooker