Features: * Contains no.1058 vent pipe, no.09978 pressure regulator, and instruction book for selected Presto pressure canners manufactured prior to 1950 * Replaces the existing vent pipe and petcock pressure control weight no.85073, which is no longer available * Use on presto canner models no.7, 7S, 7AV, 21-21S, and 21 AV What"s In The Box: * National Presto 85485 Pressure Cooker Regulator Kit