DJS1167 Features: * Suction cup base * Material: High strength composite * Ball size: 1"" Rubber ball "B" size * Suction cup twist lock base contains a standard RAM double hole diamond shaped end * Diamond shaped end has two holes 1.91"" from center to center * Connect to RAM-B-238 diamond plates series, the universal industry standard AMPS hole pattern or directly to the back of the RAM composite HOL cradles * Suction base does not have a RAM 1"" rubber connection ball Dimensions: * 3.3"" Diameter suction cup is designed to have an extra strong hold on any smooth non-porous surface, but for best result, mount the suction cup on a glass surface