RAM Mount Flat Surface Mount f/Garmin Montana® SeriesRAM Flat Surface Waterproof Mount f Garmin Montana Series This RAM high strength composite cradle is designed to hold the following devices: Garmin Montana 600 Garmin Montana 650 Garmin Montana 650t Features: 1. Open access to all electronic ports and camera 2. Patent pending roller design for super smooth placement and removal of the GPS Material: High strength composite RAM B 138 GA46 includes a 2. 5 inch diameter circular base with a universal AMPS