As well as the bass plywood you will also need a piece of black walnut plywood as a background and a sheet of thick transparent Acrylic for the front of the box.（I used P2 to cut acrylic files. If you can't cut transparent acrylic, you can also manually cut a sheet of one millimeter thick clear acrylic） One final addition, you will need three pieces of 5 millimetre wooden dowel. Two of them 24mm long and one 18mm long.