RAM Long Double Socket Arm for 1.5" Ball BasesThe RAM-201U-D LONG double socket arm has a socket at both ends that acmodates 1.5" 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: 9.125"Socket-To-Socket Length: 8.75" Material: Powder Coated Marine Grade Aluminum Ball Size: 1.5" Rubber Ball Size Product : RAM MOUNT LONG DOUBLE SOCKET ARM FOR 1.5" BALL Manufacturer : RAM MOUNT Manufacturer Part No : RAM-201U-D UPC : 793442020117