The RAM-E-246U-IN1 consists of a 3.38" rubber ball, connected to a 4.75" square plate with 4x100mm holes and 4x75mm holes in each corner. This product is a steel reinforced VESA plate due to a steel screw that is included in the structure of the VESA plate, enhancing structural integrity of the component. This additional screw is the reason why the RAM-E-246U-IN1 is slightly heavier than the RAM-E-246U.