RAM Universal D Size Ball Mount For 9 Inch - 12 Inch Fishfinders & Chartplotters 170-RAMD115C
A base with a 2.25" diameter D size ball, arm and a 6.25" x 2" marine electronic plate with a D size ball for larger devices.
The plate contains different combinations of pre-drilled holes and is a direct fit for 9"-12" fishfinder gimbal brackets.
Ball: 2-1/4"
Length: 7.3"