RAM 2.5" Round Base (AMPs Hole Pattern) with 0.31-18 female thread & 1.5" Ball
The RAM-202U-MT1 consists of a 1.5" diameter rubber ball connected to a flat 2.5" diameter base with 0.31-18 female thread. This mount has pre-drilled holes, including the universal AMPS hole pattern.
Powder Coated Marine Grade Aluminum
1.5" Rubber Ball Size
The "U" in the part number reflects product packaged in poly bag.