RAM Long Double Socket ArmOVERVIEW The RAM B 201U C consists of a long double socket arm that accommodates 1"" B size ball bases, device holders, and adapters. With an overall length 6"", this is the longest B size RAM double socket arm size and adds more reach to your favorite mounting solution. The easy to adjust knob allows for near infinite adjustability for your connected device. PRODUCT DIMENSIONS Overall Length: 6"" SOCKET TO SOCKET LENGTH 5. 31"" BALL SIZE B Size (1"")