- Up to three 5015 centrifugal fans similar to these: http://www.ebay.com/itm/6-pcs-Brushless-DC-Cooling-Blower-Fan-5015B-12V-50x50x15mm-2-Wires/141324730524 - An LED light ring, which has an outside diameter of 60mm and inside diameter of 50mm. There are many inexpensive ones on Amazon and eBay. - 6 ball studs (which I sell for $1 each, plus postage). - 6 M3 Nyloc nuts for the ball studs. - 2 M3x10 socket head cap screws and 2 M3 nuts. - an M3x25 socket head cap screw and M3 nut for each fan. - a small amount of tape, for shimming the hotend, to make it tight. Silicone glue or caulking, or rubber cement also works well. - a switch if you would like to use the z-probe. I only use the z-probe for auto-calibration and then I remove it. - a 30mm axial fan, if you are using a J-Head.