Check the listing for details. RAM-166-B-202U RAM Twist-Lock Suction Cup Mount with Round P.... Color: Black, Condition: New. Listed at 74.44 USD. RAM Twist-Lock Suction Cup Mount with Round P... RAM-166-B-202U Genuine RAM Products! The RAM-166-B-202U consists of a single suction cup base, a short length C size double socket arm, and a 2.5 INCHES round plate with AMPS hole pattern.hardware included Assembly Hardwaresuction size 3.3 INCHES Diametersocket to socket length 2.5 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES Diameterball size C Size (1.5 INCHES )weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbsmaterials Marine-grade aluminumHigh strength compositepackaging type Poly BagWeight 1.03 lb hardware included Assembly Hardware suction size 3.3 INCHES Diameter socket to socket length 2.5 INCHES hole pattern 4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES Diameter ball size C Size (1.5 INCHES ) weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbs materials Marine-grade aluminumHigh strength composite packaging type Poly Bag Weight 1.03 lb