Check the listing for details. RAM-B-166-2-AU-NB RAM Twist-Lock Small Suction Cup Base with Do.... Color: Black, Condition: New. Listed at 40.94 USD. RAM Twist-Lock Small Suction Cup Base with Do... RAM-B-166-2-AU-NB Genuine RAM Products! The RAM-B-166-2-AU-NB consists of a 2.75 INCHES suction cup twist lock base and SHORT length double socket arm 1 INCHES ball diamond bases. The suction cup base is designed to have a strong hold on glass and non-porous plastic surfaces, including RAM adhesive disks. The mount is designed with a RAM 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 socket arm is compatible with all 1 INCHES ball bases and adapters.suction size 2.75 INCHES Diametersocket to socket length 1.75 INCHES ball size B Size (1 INCHES )weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lbmaterials Marine-grade aluminumHigh strength compositepackaging type Poly BagWeight 0.36 lb suction size 2.75 INCHES Diameter socket to socket length 1.75 INCHES 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 0.36 lb