Ikea Eket Legs

Bookcase legs I personally use for my IKEA Eket bookcase. It should be possible to use for other types of bookcases or small cupboards. I haven't tested exactly how much weight they can support. But for one Eket module (70x70 cm) filled with books it is really stable and there are no issues. If you're building vertically, I would recommend fastening the bookcase to the wall, just to be safe. This is also recommended in most guides for IKEA furniture, as far as I know.