The RAM-D-2461U consists of a 2.25´´ rubber ball, connected to a 3.625´´ square plate with a 75mm X 75mm VESA hole pattern.The rubber ball is positioned 0.88´´ from the center of one edge.Specifications:Material:Powder Coated Marine Grade Aluminum.Ball Size:D Size 2.25´´ Rubber Ball.Note:The ´´U´´ in the part number reflects product packaged in poly bag.The RAM-D-2461U is compatible with the following electronic devices:MobileDemand XTablet T8600, the Glacier Computer Ridgeline, and the Routeware DMS 5000.The cradles for these electronic devices are sold strictly through the manufacturer.Click on the links above to view their cradles.Weight:0.7 lbs.