Check the listing for details. RAM-B-103-C-238U RAM Double Socket Arm with Diamond Plate - B .... Color: Black, Condition: New. Listed at 43.94 USD. RAM Double Socket Arm with Diamond Plate - B ... RAM-B-103-C-238U Genuine RAM Products! The RAM-B-103-C-238U consists of a diamond base and LONG double socket arm that will accept 1 INCHES ball bases. The diamond base measures 2.43 INCHES x 1.31 INCHES and contain two holes 1.912 INCHES from center to center, positioned at both ends of the diamond base. The hole pattern found on the diamond base will connect to many RAM cradles, as well as third party cradles including mounts with the industry standard AMPS hole pattern. Designed into the mount is a 1 INCHES diameter patented rubber ball and socket system with adjustment points at both ends of the socket arm; this with a twist of the arm knob allows for you to maneuver the mount to your optimum viewing position.socket to socket length 5.31 INCHES hole pattern 2-Hole AMPS: 1.912 INCHES ball size B Size (1 INCHES )weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lbmaterials Marine-grade aluminumpackaging type Poly BagWeight 0.6 lb socket to socket length 5.31 INCHES hole pattern 2-Hole AMPS: 1.912 INCHES ball size B Size (1 INCHES ) weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lb materials Marine-grade aluminum packaging type Poly Bag Weight 0.6 lb