Check the listing for details. RAM-B-166-A-202U RAM Twist-Lock Suction Cup Double Ball Mount .... Color: Black, Condition: New. Listed at 53.44 USD. RAM Twist-Lock Suction Cup Double Ball Mount ... RAM-B-166-A-202U Genuine RAM Products! The RAM-B-166-202U consists of a short length B-size arm with a suction cup base and 2.5 INCHES diameter round plate with universal AMPS hole pattern.hardware included Assembly Hardwareproduct dimensions Overall Height: 5.44 INCHES suction size 3.3 INCHES Diametersocket to socket length 1.75 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES Diameterball size B Size (1 INCHES )weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lbmaterials Marine-grade aluminumHigh strength compositepackaging type Poly BagWeight 0.61 lb hardware included Assembly Hardware product dimensions Overall Height: 5.44 INCHES suction size 3.3 INCHES Diameter socket to socket length 1.75 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES Diameter ball size B Size (1 INCHES ) weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lb materials Marine-grade aluminumHigh strength composite packaging type Poly Bag Weight 0.61 lb