Check the listing for details. RAP-B-102U RAM Composite Double Ball Mount with Two Diam.... Color: Black, Condition: New. Listed at 32.44 USD. RAM Composite Double Ball Mount with Two Diam... RAP-B-102U Genuine RAM Products! The RAP-B-102U consists of a double socket arm and two 1 INCHES ball diamond bases. The diamond bases contain two holes 1.912 INCHES from center to center, positioned at both ends. The hole pattern found on the diamond plate will connect to many RAM cradles, as well as third party cradles including mounts with the industry standard AMPS hole pattern.product dimensions Overall Height: 5.4 INCHES socket to socket length 3 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 High strength compositepackaging type Poly BagWeight 0.34 lb product dimensions Overall Height: 5.4 INCHES socket to socket length 3 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 High strength composite packaging type Poly Bag Weight 0.34 lb