RAM 3.68" Dia Round Plate with 2.25" Ball (RAM-D-202U)
RAM D Size Ball Short Length Socket Arm (RAM-D-201U-C)
RAM D Size Ball Mount with 2 Round Plate & Medium Arm (RAM-D-101U)
RAM D Size Ball Mount for Humminbird Helix 9 10 & 12 (RAM-D-202-25-C-202U)
Ram D Size 2.25" Ball On Round Plate with Amps Hole Pattern (RAM-D-254U)