This is only the frame - you will also need the tiles, available at
https://shpws.me/TiT5 (for 20 tiles) or
https://shpws.me/TiT7 (for a single tile). You will also require three 25mm long M2 bolts and three M2 nuts to bolt on the corner.
If you only want to play with the mechanism, you can instead buy a much cheaper prototype half cube, available at
https://shpws.me/TiT4.