OKGear FC333-6BKS 3 Pin, 3 Wire Female to (2) 3 Pin Male Fan Splitter Cable, with black sleeving. Black Sleeving & Black Connectors Each leg is about 6 Inches One Female 3 Pin Fan Connector 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.