Compatible with all Garmin nuvi having 17mm ball socket patternCompatible with all Garmin StreetPilot models c310/c510/c530/c550 and c580Mount Garmin GPS unit to car\'s drink cup holder Pedestal features a flexible goosneck for optional adjustment when mounting from the cup holder location Pedestal base is adjustable to fit most drink cup holdersNot compatible with pop-out type drink cup holdersLength: 7.50Width: 4.75Height: 4.75