Check the listing for details. RAM-103U-D-2461 RAM Double Socket Arm with Diamond Ball Plate.... Color: Black, Condition: New. Listed at 75.94 USD. RAM Double Socket Arm with Diamond Ball Plate... RAM-103U-D-2461 Genuine RAM Products! This RAM-103U-D-2461 consists of a 1.5 INCHES rubber ball, connected to a 3.625 INCHES square plate with a 75mm X 75mm VESA hole pattern and LONG length double socket arm. The rubber ball is positioned 0.88 INCHES from the center of one edge. The double socket arm will attach to all RAM 1.5 INCHES dia. ball bases.socket to socket length 8 INCHES hole pattern 75 x 75mm VESAplate size 3.625 INCHES x 3.625 INCHES ball size C Size (1.5 INCHES )weight capacity Standard Use: 4 lbsHeavy-Duty Use: 3 lbsmaterials Marine-grade aluminumpackaging type Poly BagWeight 2.1 lb socket to socket length 8 INCHES hole pattern 75 x 75mm VESA plate size 3.625 INCHES x 3.625 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 2.1 lb