ITEM NAME:IDE 4-Pin To 4X 3-Pin TX3 Case Cooling Fan Power Adapter Converter Cable M&E.Connector B: 2 - TX3 3-pin Female (2 wires only, missing the pin of tach). Connector A: 1 - 5.25" Molex 4 pin LP4 Male. Wire Gauge: Copper - UL1007 Wire. This adatper cable works to serve the purpose of being able to add up to 4 more fans, two for 12V DC and the others for 5V DC.