Ikea kallax insert (SE1 7, Lambeth North)

Ikea kallax insert - they stopped making these! It's grey plastic and fills half the kallex shelf. So if you have it as a room dividerypu can use both sides, or if against the wall ypu can hide stuff behind it. It clicks in onto the shelf above or below it and has 4 differently sized compartments. Really handy to divide the big kallax shelf into smaller parts.

Collection from SE1 7 near Lambeth North. 3rd floor, no lift!