RAM 3.625" Square Plate with VESA (4 X 75mm) (4 X 100mm) Hole Patterns & 1.5" Diameter BallThis RAM-246U consists of a 1.5" rubber ball, connected to a 4.75" square plate with 4x100mm holes and 4x75mm holes in each corner. Material: Powder Coated Marine Grade Aluminum Ball Size: 1.5" Rubber Ball Size Note: The "U" in the part number reflects product packaged in poly bag. | RAM Mount 3.625" Square Plate w/ VESA Hole Pattern & 1.5" Ball