RAM-D-115BU - RAM Mounts Marine Electronics Ball Adapter The RAM-D-115BU, universal mounting plate, consists of a 2.25" diameter rubber ball, connected at right angles to a flat 6.25" x 2" rectangular plate. The plate contains different combinations of pre-drilled holes which will match up to many electronic devices, compatible with Garmin and Lowrance gimbal mounts. PLATE SIZE: 6.25" x 2" BALL SIZE: D Size (2.25") WEIGHT CAPACITY: Standard Use: 6 lbs - Heavy-Duty Use: 5 lbs MATERIALS: Marine-grade aluminum WEIGHT: 0.64 lb Features: D size ball adapter for 9"-12" fishfinder gimbal brackets RAM® Mounts ball and socket technology allows for near-infinite adjustability Made of Powder-coated, marine-grade aluminum for durability and reliability in the most demanding marine environments