This set consists of six movement trays. Each tray consists of of two 1.5mm thick HDF pieces - base and top with cutouts for five 25mm bases. The parts have to be glued together before use.

HDF bases are the most inexpensive way to quickly set your numerous models on their feet (or re-base, if that rules update hit you out of nowhere). Precise laser cut ensures that the base will always keep the correct size.