The RAM-B-202U is a 2.5" Round Base with AMPs Hole Pattern that will allow you to connect a range of compatible (B size) RAM components (sold separately) using a ball and socket connection.
The RAM-B-202u consists of a 1" diameter rubber ball connected to the 2.5" base.
The RAM-B-202U will attach to any RAM composite cradle. Many customers use the RAM-B-238U for the same purpose too.
(Product packaged in poly bag.)