Manufacturer Description The RAM-D-115-E consists of a base with a 2.25” diameter D size ball, a long arm and a 6.25” x 2” marine electronic plate with a D size ball for supporting larger devices. This marine electronic plate contains different combinations of pre-drilled holes and is a direct fit for 9”-12” fishfinder gimbal brackets. Supports devices such as the Lowrance HDS-9 Gen2 Touch, Garmin GPSMAP 7407 and more. Please Note: The Lowrance Unit Depicted Is Not Included With This ItemFeaturesOverall Length: 15.2" Weight Capacity: Up to 6 lbs.