Can vegetables, fruits, meats, poultry, and seafood with confidence. Doubles as a boiling water canner for preserving fruits, jams, jellies, pickles, and salsas. The easy-to-read gauge automatically registers a complete range of processing pressures. 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. Constructed of extra-strong aluminum and suitable for use on regular and smooth-top ranges. Includes cooking/canning rack and complete instruction and recipe book. Mason Jar Capacity: 24 Half-Pints, 20 Pints, 7 Quarts.