Rectangular base, 2.25 inch
15.9x5.1 cm (6.25x2 inches), 2.25 ball (size D) - RAM-D-115BU
This universal mounting plate consists of a 2.25″ diameter rubber ball, connected at right angles to a flat 15.9×5.1 cm (6.25×2 inches)rectangular plate. The plate contains different combinations of pre-drilled holes which will match up to many electronic devices.
Datenblatt
Datenblatt (PDF)