This is an original Mirro S-9882 gasket for Mirro / Mirro Matic Pressure Cookers and Canners. This gasket fits Models M-312, M-312-35, M-406, M-416, M-512, M-512-11, M-522, M-526, M-526-11, and M-622 made after January 1983. This gasket will not fit mirro canners / cooker if the model number begins with 92***
