This patented bagging material is designed for use with all Deni Magic Vac vacuum packaging systems and helps preserve food up to five times longer than the standard plastic storage containers. The box comes with two replacement rolls, each measuring 8 inches by 20 feet, that can be accurately sized with the Magic Vac"s bag cutter feature. The 3-Ply, commercial strenght plastic is durable enough to reduce the rate of spoilage, eliminate food odors, and protect froxen foods from getting freezer burn. The plastic is also FDA approved to be safe for boin-in-a-bag cooking or microwaving leftovers.