Check the listing for details. RAM-101U-225 RAM Double Ball Mount with Round & Rectangula.... Color: Black, Condition: New. Listed at 67.94 USD. RAM Double Ball Mount with Round & Rectangula... RAM-101U-225 Genuine RAM Products! The RAM-101U-225, powder coated marine grade aluminum mount, consists of a 6 inch double socket arm, one round 2.5 INCHES diameter round base with the universal AMPS hole pattern and one 2 INCHES x 2.5 INCHES rectangular base. Rubber ball, socket technology dampens shock and vibration, as well as allows for almost infinite adjustment, perfect viewing angles. For most applications, mount will support up to 4 pounds.product dimensions Overall Height: 7.35 INCHES socket to socket length 4.66 INCHES hole pattern Round Plate:4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES DiameterRectangular Plate: 1.5 INCHES x 2 INCHES ball size C Size (1.5 INCHES )weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 1.12 lb product dimensions Overall Height: 7.35 INCHES socket to socket length 4.66 INCHES hole pattern Round Plate:4-Hole AMPS: 1.181 INCHES x 1.496 INCHES 3-Hole 120-Degree: 1.812 INCHES DiameterRectangular Plate: 1.5 INCHES x 2 INCHES ball size C Size (1.5 INCHES ) weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbs materials Marine-grade aluminum packaging type Poly Bag Weight 1.12 lb