Features Complete flat surface, drill-down mounting solution for large marine electronics with an overall height of 8.125" RAM® Mounts ball and socket technology allows for near-infinite adjustability Made of power-coated, marine-grade aluminum for durability and reliability in the most demanding marine environments Backed by a lifetime warrantyOverviewThe RAM-D-111U-C consists of a short double socket arm, 3.68" diameter round base, and 11" x 3" rectangle base. The round base includes a 2.25" D size rubber ball and contains pre-drilled holes, including the universal AMPS hole pattern. The rectangle base also includes a 2.25" D size rubber ball and contains a variety of pre-drilled holes that are compatible with several large marine electronic devices, including fishfinders and chartplotters.Hardware Included(4) .312" x .187" Shoulder WashersProduct DimensionsOverall Length: 8.125"Socket-to-Socket Length3.6"Hole PatternSee DrawingsPlate SizeTop Plate: 3" x 11"Bottom Plate: 3.68" Diamet