Check the listing for details. RAM-201U RAM Double Socket Arm - C Size Medium.... Color: Black, Condition: New. Listed at 38.94 USD. RAM Double Socket Arm - C Size Medium... RAM-201U Genuine RAM Products! The RAM-201U consists of a medium length double socket arm that accommodates 1.5 INCHES C size ball bases, device holders, and adapters. A single spring inside the arm keeps the socket open, and allows you to insert the ball into the socket connection. This arm has an overall length of 5.69 INCHES . The easy to adjust knob allows for near-infinite adjustability.product dimensions Overall Length: 5.69 INCHES socket to socket length 4.66 INCHES ball size C Size (1.5 INCHES )weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 0.71 lb FEATURES Medium length double socket arm has an overall length of 5.69 INCHES and a socket-to-socket length of 4.66 INCHES Attaches to any C size RAM ball component, including mounting bases and device holders; double ball and socket technology allows for near-infinite adjustability of your RAM mounting system Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments Backed by a lifetime warranty product dimensions Overall Length: 5.69 INCHES socket to socket length 4.66 INCHES ball size C Size (1.5 INCHES ) weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbs materials Marine-grade aluminum packaging type Poly Bag Weight 0.71 lb