Pressure canning, the only method recommended safe by the U.S.D.A. for canning low-acid foods, allows you to preserve meats, vegetables, and fruits. Presto pressure canners feature an easy-to-read dial gauge for accurate pressure control and extra strong, warp-resistant aluminum construction. The air vent/cover lock allows pressure to build only when the cover is closed properly and prevents the cover from opening until pressure is safely reduced. Includes cooking/canning rack and complete instruction/recipe book. 22-Quart Liquid Capacity (20.9 Liters).