The RAM-B-349U includes a M10 x 1.25 pitch male thread connected to a 1" rubber ball.
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. The threaded hole must have the following dimensions for this product to fit: M10 x 1.25 pitch with a 14.5mm flange diameter with a 10.15mm thread length