GVO Marine Electronics: We provide reliable, safe online shopping 24 hours a day, 7 days a week throughout the U.S. and the world. We are strongly committed to providing our customers with top quality merchandise and world class service. 52850 RAM Quick Release Adapter with 1" Diameter Ball for "LIGHT USE" Lowrance Elite-4 Mark-4 Series Fishfinders The RAM adapter base includes a 1" diameter rubber ball and inserts directly to the back of Lowrance Elite 4 and Mark-4 Fishfinders. The adapter serves as a quick release mechanism, allowing you to remove or transfer your Fishfinder in seconds. Compatible Devices: Lowrance Elite-4 Lowrance Elite-4 DSI Lowrance Elite-4 Gold Lowrance Elite-4x Lowrance Elite-4x DSI Lowrance Elite-4m Lowrance Mark-4 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. RAM Double Socket Arm for 1" Ball Bases The RAM-B-201U, standard double socket arm, has a socket at both ends that accommodates 1" ball bases. A single spring inside the arm opens the end sockets, allowing you to pivot the ball and socket connection. This socket technology allows for almost infinite adjustment and perfect viewing angles. Dimensions: Overall Length: 3.69" Socket-To-Socket Length: 3" Material: Powder Coated Marine Grade Aluminum Ball Size: 1" Rubber Ball "B" Size RAM Mount 2-7/16" Diameter Base w/1" Ball The (RAM-B-202U) RAM marine grade aluminum base contains a 1" diameter rubber ball connected to a flat 2.5" diameter base. This mount has pre-drilled holes, including the universal AMPS hole pattern. Material: Powder Coated Marine Grade Aluminum Ball Size: 1" Rubber Ball "B" Size GVO Marine Electronics: . Get the item you ordered or get your money back. Covers your purchase price and original shipping.