The RAM-B-202U-LO11 includes a 1" diameter rubber ball and inserts directly to the back of Lowrance Elite 4, Mark-4 and Hook-4 Fishfinders. The adapter serves as a quick release mechanism, allowing you to remove or transfer your Fishfinder in seconds.
Material: Powder Coated Marine Grade Aluminum
Ball Size: 1" Rubber "B" Ball Size
Note: The "U" in the part number reflects product packaged in poly bag. RAM recommends this adapter base for "Light Use" mounting applications, including light weight Lowrance Elite and Mark Fishfinders.