RAM Mounts 75x75mm VESA Plate with Ball and 3/8"-16 Threaded Hole

This RAM-2461U-EXT1 consists of a 1.5" rubber ball, connected to a 3.625" square plate with a 75mm X 75mm VESA hole pattern. Included on the plate is a 3/8"-16 tapped hole. The rubber ball is positioned 0.88" from the center of one edge.