Designed for easy, confident home pressure canning. The only method recommended safe by the U.S. Department of Agriculture for canning low-acid foods such as vegetables, meats, poultry, and fish. Deluxe pressure dial gauge registers the complete range of processing pressures. Doubles as a boiling-water canner for preserving fruits, jams, jellies, pickles, and salsa. Special air vent/ cover lock allows pressure to build only when the cover is closed properly and prevents the cover from being opened until pressure has safely dropped. It also gives a visual indication of pressure inside the canner. Constructed of warp-resistant heavy-gauge aluminum for fast, even heating. Includes canning rack and complete 76-page instruction and recipe book. Works on regular and smooth-top ranges. Extended 12-year limited warranty. Regular Mason Jar Capacity: 24 Half-pints 20 Pints 7 Quarts Presto* 23-Quart Pressure Canner and Cooker 23-quart liquid capacity (21.8 liters) Stock No. 01781 *"Presto" is a registered trademark of National Presto Industries, Inc. in the United States of America and/or other countries.