Presto Brushed Aluminum Cooker Canner, 23 qt.Pressure canning is the only canning method recommended safe by the USDA for low acid foods such as vegetables, meats, and fish. Presto pressure cooker features an easy to read dial gauge that automatically registers a complete range of processing pressures. Air vent cover lock allows pressure to build only when the cover is closed properly. It also prevents its lid from opening until the pressure is safely reduced. Presto pressure cooker also doubles