Features: ---Glare shield clamp base with 1" rubber ball - mounts to lip edge of flat surfaces from 4.4mm / 0.17" - 28.0mm / 1.12 ---Double socket short arm - overall length: 2.24", socket-to-socket length: 1.75" ---Diamond base adapter with 1" ball - connects to the cradle and the mount ---Custom form-fit cradle for Garmin GPSMAP (See compatibility chart below) ---Full access to all ports - Simple to install, easy to use and remove ---Constructed of powder coated marine grade aluminum & high strength composite ---Holds up to 2 lbs. ---Made in the USA Compatible Devices: Garmin ---GPSMAP 176 ---GPSMAP 176C ---GPSMAP 196 ---GPSMAP 276C ---GPSMAP 296 ---GPSMAP 376C ---GPSMAP 378 ---GPSMAP 396 ---GPSMAP 478 ---GPSMAP 496 Brand: RAM Mounts Part number: RAM-B-177-GA7U Warranty: Manufacturer's lifetime warranty.