U.FL to RP-SMA Pigtail Connector for the most common Mini PCI and Mini PCI-Express WIFI adapters. U.FL connector attaches to the Mini PCI card and the RP-SMA (Reverse Polarity SMA) connector docks with the antenna. Long 18cm (~7 inches) length.

If you're not sure if this pigtail is right for your application, please see the following wiki for reference: http://en.wikipedia.org/wiki/Hirose_U.FL