RAM Mounting Systems RAM-B-149Z-GA37U Ram Mount U-Bolt Rail Mount for the Garmin Nuvi 1690 Patented universal rubber ball and socket system allows you to mount virtually anything anywhere. Made of marine grade aluminum with a powder coated finish and rubber balls Superior shock and vibration isolation for electronics Unique design provides easy installation, mobility, strength, adjustability and versatility Construction provides a light weight and corrosion resistant product