RAM Double Socket Arm is a medium length adjustable double socket arm suitable for either a 1in B-Size ball base or C-Size 1.5in ball base. This standard RAM® double socket arm measures an overall length of 3.73in and socket-to-socket length of 3. It easily attaches to any B or C size RAM® ball components, including mounting bases and offers near-infinite adjustment. The arm is made of durable, powder-coated, marine-grade aluminum for reliability in demanding environments and is supported by a lifetime warranty. Ball sizes include B-Size (1in) or C-Size (1.5in), with lengths of Medium (3.73in) or Long (6in). The standard use weight capacity is 2 lbs while heavy-duty use can support 1 lb.