I bought a cheap wire shelving unit for the kitchen at Target. After putting it together, this is what was left. Now, some of those pieces are meant to be extra “feet,” so you can separate the shelves into two units. Why they gave me 12 feet when at most I’d need 8, is a mystery. The metal washer and the black plastic ring thingies? I have no idea. They weren’t on the parts list included with the instructions.