Pressure Cooker Gasket fits Mirro Pressure Cooker Models Soak the New Sealing Ring of a Pressure Cooker in Warm Water for 10 minutes Before Installation to Increase Flexibility. S-9882 Pressure Cooker Ring Gasket Fits for Mirro Pressure Cooker Models: M-0312-35, M-0406, M-0416, M-416M, M-0512, M-0512-11, M-0522, M-0522-11, M-0526, M-0528, M-0526-11, M-0622.