2″ x 5″ Rectangle Base with 2.25″ Ball The RAM-D-202U-25 consists of a 2.25″ diameter rubber ball connected at right angles to a 2″ x 5″ rectangular base. This mount has pre-drilled holes at each corner of the base. Features:Material: Powder Coated Marine Grade AluminumBall Size: 2.25″ Rubber Ball SizeWeight: 0.69 lbs.