I was expecting set (8) for 2 shelves. This is actually a set of (4) split aluminum sleeves for a shelf, so listing it as a package (8) is misleading. I bought these to replace the plastic slotted sleeves that came with one of the shelves I recently bought. I expect they can hold more weight than the ones that come with the wire shelving kit, but having swapped out the plastic sleeves I'm a bit skeptical. It would be nice to know what is the maximum storage weight they can carry on a shelf.