Check the listing for details. RAM Flat Surface Marine Electronics 1.5" Ball Long Arm Mount - RAM-111U-D. Condition: New, Made in United States. Listed at 85.49 USD. Features: 2.5" diameter round base with 1.5" ball and AMPS hole pattern Long size double socket arm - Overall Length: 9.125", Socket-To-Socket Length: 8" 6.25" x 2" rectangle base with 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* Constructed of powder coated marine grade aluminum Overall height if fully straight: 10.68" Genuine RAM Mount: Part # RAM-111U-D Manufacturer's lifetime warranty Made in the USA Device Compatibility:** Garmin Fishfinders and GPS Chartplotters Humminbird Fishfinders and GPS Chartplotters Lowrance Fishfinders and GPS Chartplotters Raymarine Fishfinders and GPS Chartplotters *The 6.25" x 2" rectangle base is a universal mounting bracket with a selection of mounting hole locations.