Check the listing for details. RAM-D-201U-E RAM Double Socket Arm - D Size Long.... Color: Black, Condition: New. Listed at 121.44 USD. RAM Double Socket Arm - D Size Long... RAM-D-201U-E Genuine RAM Products! The RAM-D-201U-E, long double socket arm, has a socket at both ends that accommodates 2.25 INCHES 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.product dimensions Overall Length: 12.98 INCHES socket to socket length 11.41 INCHES ball size D Size (2.25 INCHES )weight capacity Standard Use: 6 lbsHeavy-Duty Use: 5 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 3.82 lb product dimensions Overall Length: 12.98 INCHES socket to socket length 11.41 INCHES ball size D Size (2.25 INCHES ) weight capacity Standard Use: 6 lbsHeavy-Duty Use: 5 lbs materials Marine-grade aluminum packaging type Poly Bag Weight 3.82 lb