RAM Marine Humminbird / Lowrance "RUGGED USE" Electronic Base attribute-drill-down so there's still some tension

so there's still some tension on one of the balls when you loosen the arm to reposition it

Montana® 610t

75") — requires minimum device height 139

RAM-235U RAM® Double U-Bolt Ball Base for 25

RAM Marine Humminbird / Lowrance "RUGGED USE" Electronic Base attribute-drill-down so there's still some tensionRAM 107BU RAM Fishfinder Ball Adapter for Humminbird Devices (Rugged Use) The RAM 107BU is a 1. 5" ball "rugged use" marine electronics base for the Humminbird 100, 300, 500 and 700 Series, Matrix Series, and Lowrance Elite 5 Series. It connects to the underside of compatible devices and mates to any RAM C series double socket arm. Key Features Adaptor for heavier Humminbird, Lowrance and Raymarine devices 1. 5" ball mates to any RAM C series arm