Replacement Gasket for Models: M-312, M-312-35, M-406, M-416, M-512, M=512-11, M-522, M-526, M-526-11, M-622. For models made after January 1983. See date stamp on bottom of canner. Wash gasket in warm soapy water, rinse and dry thoroughly before using. Remove from cooker after every use and wash in warm soapy water.