The "U" in the part number denotes the packaging. If you're looking for a retail box, please consider RAM-111. The Parts and compatibility are identical between RAM-111 and RAM-111U.
The RAM-111U consists of a 2.5" diameter round base that contains the universal AMPs hole pattern, STANDARD LENGTH double socket arm and 6.25" x 2" rectangle base. The rectangle base contains different combinations of pre-drilled holes which will match up to many electronic devices and mounts, including Marine GPS, CB Radios, Ham Radios, Gimbal Brackets and more.
Note: The "U" in the part number reflects product packaged in poly bag. The 6.25" x 2" rectangle base is a universal mounting bracket with a selection of mounting hole locations. In certain applications additional holes may need to be drilled for proper fit with your electronic device.
RAM®double socket arms with their distinctive Hourglass Shape are designed and recognized to provide the best possible performance for most any application. The Hourglass Shape is a registered trademark of National Products Inc.