RAM Track Ball Mount with Marine Electronic Plate for the Eagle Cuda, FishEasy, Humminbird Piranha & Lowrance X-4The RAP-B-107-1B-354-TRA1U consists of a Track Ball base, composite double socket arm and connecting Humminbird/Eagle/Lowrance marine base. The mount is designed with a RAM 1″ diameter rubber ball and socket system that has adjustment points at both ends of the double socket arm – allowing for high adjustability to achieve perfect viewing angles. This kit is compatible with virtually any track system including the RAM Tough-Track. Ball Size:1″ Rubber “B” Ball SizeMaterial:High Strength CompositeNote:Part number reflects product packaged in a poly bag.