yes there is. if you have an internal IDE zip, like the zip 250 which i recently purchased, it will come with, or already in a fixture made for a 5" bay. i had no free ones, and took it off andinstalled it in the 3.5" bay. if you do not have one with your zip, Iomega MIGHT send you one, but i am not so sure they will. or you can go to a computer store and ask if they have any 3" bay to 5" bay converters