Fan extension cable composed of two connectors. One connector is a 4-pin Female Connector and another connector is a 4-pin Male Connector. It is designed to be compatible with both 3 pin and 4 pin PWM fans. The cable length is 30cm/12″, that is large enough for regular desktop computer cases. The cable is strong and durable black sleeved, tough and heavy duty. It can be used for PC fans to extend the fan connection length, either for one fan or in case of using a fan splitter, for two or more ventilation fans.