Specification: Material: 3pwm plastic shell Application: 3-pin hole interface Kit includes: 5pcs Female 3-Pin Connector Housings And 15pcs Terminal Crimp Pins. This 3-pin female fan connector kit allows you to create your own fan power cord. Traditionally, these connectors are used to connect directly to the receiving end of the fan. The fan can be 2-pin or 3-pin, depending on whether you need it, or a third-pin wire is available, which is responsible for sending the RPM signal to the motherboard.