The RAP-B-200-2U consists of double 1" diameter open ball sockets with a 360 rotation point at the center and a connecting swivel joint that rotates forward and back 180. The rubber ball and socket at either end, and a central pivot point provides unsurpassed adjustability. The RAM ball sockets maximize ball coverage for optimal fit. Dimensions: Overall Length: 6.25" Socket-To-Socket Length: 5.5"