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The RAM-B-347U base consists of a 1" diameter rubber ball connected at right angles to a 50mm x 43mm (2" x 1.7") square base. The base has four pre-drilled holes at each corner, making the universal 38mm x 30mm (1.5 x 1.188) hole spacing AMPS hole spacing.
This base is compatible with any device that has the 4 hole AMPS spacing. This includes the genuine Garmin cradles for the Montana, zumo and InReach GPS devices.
Powder Coated Marine Grade Aluminium
1" Rubber Ball "B" Size