Check the listing for details. RAP-B-138U RAM Composite Drill-Down Mount with Diamond P.... Color: Black, Condition: New. Listed at 33.44 USD. RAM Composite Drill-Down Mount with Diamond P... RAP-B-138U Genuine RAM Products! The RAP-B-138U consists of a composite 2.5 INCHES diameter round base that contains the universal AMPs hole pattern, double socket arm and diamond base adapter. The mount is designed with a 1 INCHES diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The hole pattern found on the diamond base adapter will connect to most RAM cradles. The included RAM's patented design dampens shock and vibration, helping to extend the life of your device.product dimensions Overall Height: 5.03 INCHES socket to socket length 3 INCHES hole pattern 2-Hole AMPS: 1.912 INCHES 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES plate size Round Plate: 2.5 INCHES DiameterDiamond Plate: 2.43 INCHES x 1.31 INCHES ball size B Size (1 INCHES )weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lbmaterials High strength compositepackaging type Poly BagWeight 0.36 lb product dimensions Overall Height: 5.03 INCHES socket to socket length 3 INCHES hole pattern 2-Hole AMPS: 1.912 INCHES 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES plate size Round Plate: 2.5 INCHES DiameterDiamond Plate: 2.43 INCHES x 1.31 INCHES ball size B Size (1 INCHES ) weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lb materials High strength composite packaging type Poly Bag Weight 0.36 lb