Check the listing for details. RAM-D-101U RAM Double Ball Mount with Two Large Round Pl.... Color: Black, Condition: New. Listed at 159.44 USD. RAM Double Ball Mount with Two Large Round Pl... RAM-D-101U Genuine RAM Products! The RAM-D-101U consists of (2 qty) 3.68 INCHES diameter round bases and STANDARD length double socket arm. The 3.68 INCHES diameter round bases have pre-drilled holes, including two holes at 180 degrees and three holes at 120 degrees. Designed into the mount is a 2.25 INCHES diameter patented rubber ball and socket system with adjustment points at both socket ends of the arm.product dimensions Overall Height: 11.125 INCHES socket to socket length 6.88 INCHES hole pattern See Drawingplate size 3.68 INCHES Diameterball size D Size (2.25 INCHES )weight capacity Standard Use: 6 lbsHeavy-Duty Use: 5 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 3.95 lb product dimensions Overall Height: 11.125 INCHES socket to socket length 6.88 INCHES hole pattern See Drawing plate size 3.68 INCHES Diameter 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 3.95 lb