excellent 4-pin pwm 1 to 2 splitter 2 way fan power supply extension cable for pc computer atx case internal motherboard fans, make you easier diy pc computer case. widely compatible: support 4-pin and 3-pin fans cable, the 1 to 2 splitter fan power extension cable compatible with 4 pin and 3 pin pc case fans. black sleeved nylon braided cable, more durable and make the inside of pc case looks more clean & tidy. plug-n-play, easy to plug, the fan extension cable offers greater flexibility between motherboard and cpu cooling fans. package contents: pack of 2 black 10.5 inch 1-to-2 splitter fan power supply extension cables, male to female connector plug.