3-Pin Fan Cable Y Splitter Extension with Black Sleeving & Black Connectors (6" Length) Black Sleeving & Black Connectors 6" Length One Female 3 Pin Fan Connector Two 3 Pin Male Fan Connectors Note: Only one 3-Pin male connector has a tachometer/speed wire. This is because motherboards/fan controllers cannot accurately read the fan speed when two speed signals are being given simultaneously. This cable is made correctly to avoid this problem, with only one tachometer wire on one of the male connectors.