All American 1930: 30qt Pressure Cooker/Canner (The 930) - Exclusive Metal-to-Metal Sealing System - Easy to Open & Close - Suitable for Gas or Electric Stoves - Made in the USA

All American pressure Canner/Cookers feature an exclusive, precision machined "metal-to-metal" sealing system. Positive action clamping locks align the cover to the base, forming a steam-tight seal. At the same time, this metal-to-metal seal automatically permits venting under unusual pressure conditions providing an extra margin of safety over conventional rubber or composition gasketed cookers.