The RAM-B-238U-INT1 consists of a 1" diameter rubber ball connected at right angles to a 2.43" x 1.31" diamond base. The base has two holes 1.912" from center to center, matches the industry standard AMPS hole pattern and will connect to a large variety of RAM Mount and third party cradles. 

Hardware Pack:
(2 qty) 10-32 x 7/16" Long PH PD SS Machine Screws
(2 qty) Black Lock Washers
(2 qty) 10-32 Flat Panel Weld Nuts

Material: 
Powder Coated Marine Grade Aluminum 

Ball Size: 
1" Rubber Ball "B" Size 

Note: 
The "U" in the part number reflects product packaged in poly bag.