?D? Size 2.25 inch Ball Mount with 3.68 inch Round Base, Short Arm (Jam Nut) & 2.4375 inch Round Base The RAM-D-101-C-254 consists of a 3.68 inch diameter round base, short double socket arm and 2.43 inch diameter round base. The 3.68 inch diameter round base has pre-drilled holes, including two holes at 180 degrees and three holes at 120 degrees. The 2.43 inch diameter round base contains the universal AMPs hole pattern. The mount is a 2.25 inch diameter patented rubber ball and socket system with adjustment points at both socket ends of the arm. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. Weight Capacity: Up to 15lbs, 6.75kg Material: Powder Coated Marine Grade Aluminium Ball Size: 2.25 inch Rubber Ball Size
eBay