This is a 4\" connector cable that interfaces U.FL RF connectors to regular SMA connectors. This cable is commonly used to connect larger GPS antennas and quad-band cellular antennas.
**Documents:**
* [Datasheet](http://www.sparkfun.com/datasheets/Wireless/Antenna/0271113IPEX-102.pdf)
* [RF Connector Buying Guide](https://www.sparkfun.com/pages/RF_Conn_Guide)