Presto 82117 / 33804 Overpressure Plug for pressure cooker and canner models built after 1877. Fits Presto Pressure Cooker models: 01/PA4, 01/PA4H, 01/PA6, 01/PA6H, 01/PE3, 01/PE6, 01/PS4, 01/PS6, 121001, 121002, 121004, 122101, 122102, 122104, 124001, 124102, 125001, 125002, 125004, 125005, 126002, 126101, 126102, 126104, 126105, 126306, 126407, 128202, 128303, 131001, 134001, 134103, 134104, 135001, 135004, 136001, 136102, 136203, 136304, 136403, 137001, 211101, 215101, 215102 Fits Presto Pressure Canner models: 01/C13, 01/C17, 01/C22, 01/CG22, 171001, 171002, 171003, 174001, 175001, 175002, 175003, 175004, 175005, 175006, 175107, 177001, 178001, 178002, 178003, 178003, 178004, 178005, 178006, 178107