Ram Double Suction Cup Base with 2-1/2 round ball adapter.
Ram Double Suction Cup Base. 3.3" Diameter Suction Cup with Twist Lock. The 3.3" diameter suction cups are designed to have an extra strong hold on any smooth non-porous surface, but for best result, mount the suction cups on a glass surface. The (RAM-B-202U) RAM marine grade aluminum base contains a 1" diameter rubber ball connected to a flat 2.5" diameter base. This mount has pre-drilled holes, including the universal AMPS hole pattern.
Note: This does include mounting hardware.