i recently bought a new vacuum sealer ( it broke) but before it did I was able to vacuum seal some meats. I cannot believe I did not do this sooner. I ran out of bags and rolls and needed more so I bought these. They fit my vacuum sealer so well. I prefer the rolls as I can choose what size I need b cause none of my meat is standard siz d. It also allows me to portion out my food. Cutting to size is my preference and also these are the real deal. Much better than they premade sizes. Will continue to buy more of these as needed because they are essential to my household needs.