Quantity   Component name
1 × 12V PSU I used a PSU from an old 3D printer.
1 × 12V TEC A peltier device AKA thermoelectric cooler. A few dollars on eBay.
1 × Heat sink Any heat sink that will fit in your machine. It helps maximize the cooling ability of the TEC.
1 × Thermal compound Grease or glue. Depends on your situation.
1 × 3d Printer
1 × 40mm Cooling Fan