This product is either discontinued or we cannot get that from suppliers.
3-Hole 120-Degree: 1.812" Diameter, Plate Size: 2.5" Diameter, Ball/Socket Size: C Size (1.5"), Weight Capacity: 4 lbs, Materials: Marine-grade aluminum.
The RAM-202U, marine grade aluminum base, consists of a 1.5" diameter rubber ball connected to a flat 2.5" diameter base. This mount has pre-drilled holes, including the universal AMPS hole pattern.