I really don't know much about these. I got these but was never able to use either one. Apparently, these are made specifically for the mattresses with no springs. These are brand new/never used and are actually very expensive. I have two: 1 Twin XL and 1 Queen. These are heavy and you will need a truck. We will have to work out a time to get them because they are in my garage. This is really all I know about them. Please don't ask me a bunch of questions because I don't know the answers. Do your research if you're not sure about them. Thanks.

TempurPedic bed base (2) (Williamsport, MD)