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RAM Mounts Drill Down Vehicle Mount for Fishfinder, GPS$112.59
The RAM-202-153-202 consists of a round 2.5" diameter round base (Universal AMPs Hole Pattern), double socket arm and 1.5" x 3" rectangular base. The rectangular base contains four holes with a center to center pattern of 1" x 2.5". For most applications, mount will support up to ten pounds.