B Size RAM-B-111BU:

The RAM-B-111BU consists 1" diameter rubber ball connected to a flat 6.25" x 2" rectangle base. The base contains different combinations of pre-drilled holes which will match up to many electronic devices and mounts, including Marine GPS, CB Radios, Ham Radios, Gimbal Brackets and more.PLATE SIZE 6.25" x 2"

C Size RAM-111BU:

The RAM-111BU consists of a C size 1.5" rubber ball connected at right angles to a flat 6.25 x 2" rectangular plate. The plate contains different combinations of pre-drilled holes that will match many electronic devices and mounts, including marine GPS, CB radios, Ham radios, gimbal brackets, and more.PLATE SIZE6.25" x 2"

D Size RAM-D-115BU:

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.PLATE SIZE6.25" x 2"