Presto 09936 Pressure Cooker Sealing Ring. 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 or canning. When installing a sealing ring work it into the cover in four small sections for example top bottom left and right. Work it into the groove a small section at a time until it is fully in place. Place the cover on the cooker body. Put one hand on the top center of the cover and push down firmly. Open and close the cover several times. Fits Presto Pressure Cooker models: 4 Quart Models: 01/PS4 0131001-0131004 0134001 0134103 0134104 0134105 0134106 0134108 6 Quart Models: 01/PS6 0126002 0126407 0126408 0126410 0135001-0135004 0136001 0136102 0136203 0136206 0136208 0136210 0136304 0136403 0216001