RAM Mounts RAM B 111U Marine Electronics Medium Double Socket Arm Mount RAM Universal Marine Electronic Mount (RAM B 111U A) (sku 54644) RAM B 111U A RAM Mounts Universal Marine Electronic Mount with Short 5447db8be6b8411e41a8db94705b5b27_1024x1024.jpg?v=1617121610 RAM 111U Universal Electronic Mount RAM 111U Universal Electronic Mount. The RAM B 111U A consists of a short double socket arm, 2. 5" diameter round base and 6. 25" x 2" rectangle base. The round base contains pre drilled holes, including the universal AMPS hole pattern. The rectangle 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. PRODUCT DIMENSIONS Overall Height: 3. 75" SOCKET TO SOCKET LENGTH 1. 75" HOLE PATTERN 4 Hole AMPS: 1. 181" x 1. 496" 3 Hole 120 Degree: 1. 812" Diameter See Drawing PLATE SIZE Top Plate: 6. 25" x 2. 5" Bottom Plate: 2. 5" Diameter