Deni offers commercial food preservation technology, designed to offer advanced levels of continuous food packaging for the home. Vacuum packing will revolutionize the way you store and purchase food. By storing food in a vacuum (which means without air) the shelf life for refrigerated, frozen and pantry foods is greatly increased. Air can cause food to become stale, rancid, ferment, dried out, or develop freezer burn. Vacuum packing keeps your food fresher longer. Package foods bought at farmers markets or store specials as well as items grown in the garden and portion control for later use. Foods packaged in vacuum packages such as cheeses and deli meats, once opened, will maintain their taste and quality when re-vacuumed sealed in Deni Magic Vac bags or canisters. Meats, fish an vegetables can be frozen without freezer burn maintaining their fresh flavor and texture. Dry goods such as coffee, rice, flour and nuts will also have a much stronger shelf life when vacuum packed.Each of the following includes: a commercial quality Deni Magic Vac unit, one roll 11.5" by 20 ft. bagging material, twenty 8" by 12" pre-cut bags, one wide mouth vacuum jar attachment, and operating manual. * Patented vacuum chamber system to remove air from bags o Sealing strip for a strong, secure seal * Manual seal button to stop the vacuum process for delicate foods * Manual vacuum override to override the vacuum process * Hose port for vacuum packing in canisters, bottles and jars * Seal timer for adjustable sealing time for different bag thicknesses and continuous sealing * Stainless steel bag cutter to cut bag to desired size * Convenient bag storage * Fully automatic or semi-automatic vacuum and sealing