AYA 10" 4-Pin Sleeved PWM Fan Power Y Cable Splitter (for Case/CPU Fans) PWM Y splitter cable is a 4-pin Female to 2 x 4-pin Male fan power splitter cable. You can plug in one side of the 4 pin cpu fan splitter into your motherboard and power two separate fans with it. The 10" length on this computer fan cable y-splitter 4 pin allows you better reach (especially to side, front, or back mounted case fans). Plug side 1x4 pin female connector and connector side is 1x4pin male and 1x3pin Supports 2 PWM fans from a single motherboard PWM header