The RAP-105-6224-GA12U, flex arm suction cup mount, consists of a 3.3" suction cup locking base, 6" aluminium flex rod and custom high strength composite cradle for the Garmin GPSMAP. Once the suction base is securely mounted, you can move the cradle to your optimum viewing position with a simple bend of the arm. The suction cup base is designed to have an extra strong hold on any smooth non-porous surface. For best results mount the suction cup to glass or non-porous plastic surfaces.