The Humminbird Marine aluminum base is powder-coated and features a short dual arm, a round base with a diameter of 3.68" with a 2.25" D ball, and a rectangular plate measuring 1.5" x 4.5" with a 2.25" D ball. The round plate includes two mounting holes at 180 degrees and three mounting holes at 120 degrees. The rectangular plate has a 4-hole pattern compatible with Humminbird models 8, 9, and 10. The rubber ball and base technology ensures shock and vibration absorption and allows for nearly unlimited adjustments, making it ideal for the correct viewing angle of your device.

• Complete flat surface mounting solution, drilling system, for Humminbird Helix 8, 9, 10;
• The RAM® Mounts ball and base technology allows for nearly unlimited adjustments;
• Made from marine-grade aluminum, powder-coated for durability and reliability in demanding marine environments;
• Product weight: 1361 g;
• Product dimensions: Height 7.875"; Length from socket to socket: 3.6".
• Hole pattern: Rectangular plate: 1.5" x 4.5" | Round plate: 3 holes 120 degrees (large);
• Plate size: Upper plate: 2" x 5" | Lower plate: Diameter 3.68".
• Load capacity: Normal use: 2721.55 grams | Intensive use: 2267.96 grams.
• Packaging: Polyethylene bag;
• Mount type: Drill Down;
• Ball and socket size: Size D 2.25" (holds 2721.55 grams);
• Socket length: Short arm;
• Device or accessory type: Fishfinder Chartplotter;
• Vehicle type: Motorboat.
• Recommended components: RAM-D-201U-C, RAM-D-202U, RAM-D-202U-25.